"The new layout engine in Sencha Touch 2.0 is so fast we had to use a high speed camera to measure it." source http://vimeo.com/30296006 http://vimeo.com/302960

"The new layout engine in Sencha Touch 2.0 is so fast we had to use a high speed camera to measure it." source http://vimeo.com/30296006 http://vimeo.com/30296006. Read "the improvement is so tiny you couldn't see it, so we slowed it down for you to see". The responsiveness on Android was horrible (check forums). Seems like the only real improvement so far.