just a quick post to share with you a quick test that I did with Starling :
You can choose the number of MovieClips, and to animate some properties like xy, scale, alpha and rotation.
The results seem pretty good to me. Note that I didn't do any specific optimisations, just normal code, it's just plain Starling.
You can grab the sources here (maybe you will need to add the Starling lib, minimal components by bit-101 and my Stats class) :