Sorry for the late response, it's been a busy week.
Despite what some may think, I have looked into Systema, and still am. I'm not asking these questions to belittle the style, I want to know what I'm watching because I don't understand it. I've downloaded all the videos I could get, watched each one several times, and read a bunch of articles. I got some answers, but not all.
I'll try to sharpen the questions I still have:
Loki said:
What are the main characteristics of Systema?
What sets Systema apart from other styles? Creativity, improvisation, adjustability and other general adjectives can apply to any martial art. How does Systema innovate? What would a short summary of Systema look like?
Can a 120 pound woman take down a 200 pound man with Systema?
Bad question. I'll just say I'd be much more impressed to see a smaller guy (or woman) take down a musclebound man and not vice versa as I do see on videos. Vlad can definitely move, and I wouldn't want to try him myself, but I have a hard time seeing a person with much less experience (but not inexperienced) succeeding in doing the defenses he does.
How street-efficient is Systema? Is it aimed at practicality?
A military system isn't automatically street-effective. Keep in mind that soldiers have rifles, keeping most of their combat ranged. Even special ops that do need hand-to-hand combat usually learn curriculum that's very different from what civilians learn. Krav Maga also started off military.
How long does it take to reach the equivalent of a black belt?
Got the answer I was looking for.
What does it take to qualify as an instructor?
Does this mean I can theoretically train for two months with Vlad, he'll like what he sees because I have a lot of experience in martial arts and catch on to Systema fast, and be certified an instructor?
What's the idea behind the military theme?
What military theme? Camouflage pants, military T-shirts ads on the site, dog tags, Spetsnaz logo patch... I see plenty a connection. I assume most people who train is Systema aren't Spetsnaz operatives or even members of the military. Why the intimate connection? I ask because my style also originated in the military.
What makes Systema effective/efficient?
Still haven't gotten a satisfactory answer to this one. This relates to the main characteristics issue. Simplicity? It seems this isn't a universally agreed-upon term. A video I saw of defending against a stick shows the defender moving towards the attacker and away from the stick and guiding him slowly to the floor. I find it simpler to defend while bursting towards him and attacking, take control of the weapon, beat him senseless and take the weapon. My question stands.
Why do all the people demonstrating always seem cold and detached, even somewhat cocky at times?
There were several cases where I saw the person giving the example showing several signs of disinterest in his attackers: constant scratching of the nose, not looking at the opponent at all, keeping the hands down, playing with an attacker once having him in a lock, leaving the weapon in the attacker's hand, turning the back to an armed opponent(??). I got a general feel that the defender didn't credit his attacker with being threat, but rather a nuisance.
Are there any acts of mutual respect such as bowing?
Question answered.
One more thing I see is that it seems the attacker isn't really dedicated to his attack. For contrast, see Kevin and Brian's Kenpo clips in the Video Library.