Immediate impressions are the game is gorgeous. Movement is fast and turning/aiming is responsive (not like all the early demo vids where the guys were swiping across the screen a million times just to turn a little). Voice acting so far could be better but it's still miles ahead of most iOS games (probably not Dead Space)
Your guess is as good as mine, but it can't be too much longer. It is probably propagating through the system right now which usually takes a while.