Does openGL ES have a better performance than Core Animation and UIKit when it comes to highly animated user interfaces?

Question

Currently I have an user interface that makes incredible heavy use of core animation. I wonder if it is worth to spent another 2 months for learning openGL ES? Does that really

Answer 1

I asked the same questions of people at WWDC last month and the answer was definitely yes - if you take the time to use OpenGL at a low level you will get better performance for 2D.