high end Android devices too, (with occasional lags), and in Blackberry has a lot of lags (testing the Kitchen Sink, BB Torch).

I've started the same topic on LinkedIn Sencha Forum, I am really concern about it, I'm making my bet on Sencha Touch for my future mobile projects

Sencha Touch is a great framework, I can build robust applications, more than a simple DOM manager (jquery), so, What am I missing?, how I can get optimal user experience using Sencha Touch, please advice. (Javascript optimization, compression, obfuscation?)