It can be reacted to, but is very difficult.The initial 11A sure isn't.
11AA is only punishable with 46B by Kilik normally, so its a good mixup tool to test your opponent's defence in that matchup (until they remember 'HEY! ASURA!').
In tournament play, people generally make more mistakes, so you can catch a surprising number of players out with tools like that. Example: Voldo 3B/3BB. A smart man would step, a lot of players GI and die. =/