I'm a little iffy on the music for the OP, but the animation is spot on. I actually had to watch it a couple times just to make sure I saw all the times that Medaka appeared. Gainax seems to have at least done their research on her personality and mannerisms (though I've been hearing that they've gone overboard on the ecchi), so I'm definitely more excited.
Then again, the person who was complaining said that the ecchi wasn't even in the manga. I know damn well that the manga has pretty copious amounts in it, particularly in the earliest chapters. Anyway, can't wait for this to be subbed.