I tried a simple game and used Phonegap and Appmobi to create APK's and for me appmobi run at full speed, where as phonegap was running at about 40% speed, the simple game had no sound, but was just a simple spawning of balls that drop down the screen and you touch to destroy, so for me at least appmobi seems to run alot better.
Can anyone tell me what settings for screen res, and which full screen mode they use.