I tested the iOS launcher (with my apple developper account) on ipad. I noticed 3 issues (I think they are...):
1- Centered text (Horizontal align = center) does not work. It shows aligned to left always.
2- Everything is very blurry. I tested a lot of combinations (if not all) in C2 project properties (fullscreen, webgl, sampling, rounding, etc....). It is impossible to get sharp picture and texts with cocoonJS on iOS. (tested on ipad 1 ipad 2 and new ipad (ipad 3). preview on iOs safari browser is OK, and exported to phonegap is OK too.
3- On iPad 3, retina screen "is not supported", i guess. I use 2x graphics and images in my project, and the project configured as 1024x768, and "Use iOS retina display" enabled in project properties, and scale (scale or letterbox scale). If i prevew in browser or export to phonegap, it works 100%, the scaled game (at 2048x1536 i guess) with retina graphics and texts are perfect, smooth edges and sharp image. with cocoonJS launcher it doesn't, graphics show sawtooth borders and blurry in general. I can confirm it is not scaled to 2048x1536 because with iOS browser and phonegap the loading progressbar is very small and launched in cocoonJS the progressbar is 2x larger.