First image: Construct 2 screenshot with centered+word wrap text:
Second image: Project running on iPad under CocoonJS iOS launcher:
I call this a bug, I guess it is at cocoonJS side, but who knows, maybe you can work together to check this issue :)
EDITED: I'l adding 2 more shots to show you the issue about blurry text (and graphics, but you can see very well the difference with the text)
First image: native screenshot on the iPad, running cocoonJS
Second image: native screenshot on the iPad running phonegap:
The iPad used is a new ipad (ipad 3), you'll notice because the size of the shots. Anyway i tested on iPad 2 with same results.