Danjo
Master Black Belt
Not if you aim for their little toe. The left eye, however, or the right eye, trachea, open mouth, right testicle...
It is the same point as hitting sparrows in flight with a BB gun. A matter of practice(and awareness).
You won't be able to do that if the person is moving and attacking you at the same time any more than you'd be able to hit that proverbial sparrow if it was swooping at you. The areas you mention are going to be the best protected by anyone with experience and thus even more difficult to hit.
Practicing to hit someone with three to five solid shots in a combination of kicks and punches, keeping aware of their autonomic reflex reactions and making sure that you can put real power into them is far better than trying to see if you can nail someone 16 times per second in the forehead with your fingertips while they stand there with their hands at their sides. Then if you continually practice this on several differnt people of varying sizes and quickness, you can get a pretty good feel for things. True, it's still only a drill, or "DRILL DRILL DRILL" if you prefer to rant like a child, but one that is going to go a longer way to making you a real fighter.
Speed is important, but it's not the only thing that matters. George Forman's punches looked like they took a week to land sometimes, but when they did, it knocked the opponent to the opposite side of the ring.