I'm French so excuse my poor English.
I'd like to know is if Tiny Wings, Angry Birds, and other great applications like that use cocos2D, for some or all of their game. I want to use the particle designer and we must use it with cocos2d, but I don't like the fact that the image of cocos2d appears on my application on the App Store.
Tiny Wings, Angry Birds, Mega Jump, Trainyard... to name a few, use cocos2d, box2d, or both.
Source: A description of a cocos2d book that I'm waiting to be released.
Also... you can change the default loading image of the application... easily.
-- EDIT --
To remove the frame rate from your application, remove the following line of code from your app delegate file:
[[Director sharedDirector] setDisplayFPS:YES];
Or, you can leave the line there but set it to NO
.