Im not the best expert on it as I have only recently just started training CSL. I used to do Ip ching style. The main difference is that CSL incorporate using your body to complement each hand structure when doing the forms. Like when doing the tan sau going out in the 1st section of Siu nim tao. Most wing chun there body stays still whille the tan sao goes out. In CSL your body is rising while going out- sinking while coming in. And Im not good enough to explain why.. but it just seems much more effective then anything I learned at my old school. When I visited Alans school for the first time.. All his students had better structure then me and theyd only been there for a maximum of 2 years.. was quite a revealing experience. Too me it seemed like most wing chuns think that chi sao/fighting is done with your arms/elbow and your body only turns. Chu sau lei is your whole body is powering your arms.. your elbow and hip connect. I never got taught that in my old school. Its similar to CST but not at the same time. CST has the best structure apart from CSL people from my experience. But its a different way of doing things ( not nim tao, tai gung etc). Its like learning to control pressure by inches. Hard to explain.. also Iv only really experienced a few flavours of wing chun.
It took me a little bit to get used to the way that they do things.. and it may not seem like wing chun to some people. But when you start learning it in person and get it explained to you and shown in person it makes a whole lot of sense. Then when you start sparring you can actually defend yourself. Trust me.. I reckon most wing chun people would just crumble going to that school and sparring. Alan & his students spar almost everyday. Not cooperatively. Compared to everyone I met since I started Ip ching.. left and spent a few months going round meeting some people from WSL & CST plus just other stuff.. I can say that Alan is the most skilled by far. Not that other people are not good. WSL & CST guys are actually really good most the time. But one thing that is super clear is since I started training with Alan.. I can actually spar with a mate who does boxing/muay thai and can match his pace and not look like a retard like most wing chun videos. My mate started boxing like a month or two before I left my main school, a little while in we started sparring.. and it didnt take long at all for me to start getting owned/not been able to catch up with his hands..if I had stayed I know for a fact that each week I would be staying the same while he got better in real combat, I realised the limits of what I was learning ( plus lots of issues with a crazy teacher) and eventually left and spent a while researching different lineages and opening my mind up andthen eventually visited Alans school and now I have dedicated to relearning the system under CSL ( and Cst but not bothered to explain that). CSL simply has made me be able to fight alot better then I ever could.. and this is only from a few months learning.. I still have soo much to learn now. I dont think any wing chun that has all its weight in the heels has any structure power now though.
When I watch Alans videos I see all the body structure/general wing chun principles in Chu sau lei and it makes sense. Looking at his videos from your own wing chun's lineage point of view may not make sense as they have different reasons for doing things.. All the reasons of doing things in CSL is because its been proven to be more effective/work then some other ways. Like our lan sao is mid sternum height instead of being shoulder height. I just personally think it works better for myself and I can use it better then other stuff I have learnt. Other people may not have the same experience. Excuse my poor grammar lol But this is just my personal experience with Chu sau lei.. I love it, its great and it works for me. Alan is tough as nails and hits like a truck. Watching him just waste my mate who doesnt do wing chun was awesome.. Finally get to meet a Sifu who can fight for real. I did Ip ching from when I was 11 till I was 20 ( just the usual 2- 4 classes a week for 2 hours a class type deal , plus an hour a day at home..).. I went there and got sassed by students of 2 years or less.. showed me that without body structure you really have no substance to your hand techniques.. Been able to relax and link/delink your joints at the right time is a very useful skill.. Sorry this ended up being way longer then I intended. Hopefully you can get a little insight. Alan himself is a really nice dude & good teacher. He also cares about his students and they have a good atmosphere at the school. It just doesnt look like ip man movie wing chun.. but its 100% wing chun.. all the standup is wing chun.
What is your experience ?
Thanks for reply.
I would say that in wing chun power comes mostly from the leg bypassing most of the body via elbow hip connection as you say. Pole specifically trains the elbow stance connection, centredness, and synchroneity for this on a single side of the body. For this reason tain both sides. Heel is down to recruit particular leg muscle usage, also trained initially in SNT. Upper body force of the waist is also trained by the pole via the connected hands.
From my experience CSL wing chun is geared towards prolonged contact in terms of chi sau and the "wing chun" part of the system. In many ways what CSL does is very like what Hakka arts with 3 step arrow sanchin like forms do. I personally don't think that wing chun should work that way; it is much more mobile. I don't see a huge amount of consistency in terms of the wing chun bit of CSL and the fighting bit. Fighting wise it is quite good, but I think this is mostly due to regular sparring rather than any particular genius in conception. I don't think it is a bad form of wing chun compared to many others.
Experience is sparring with Alan's guys at an MMA school where they visited. Some of his guys were very good at fighting, not so good at wing chun (in my opinion only).