So why does Apple only have OpenGL 1.2 on the X3100?

According to Intel, this can do 1.5

http://softwarecommunity.intel.com/articles/eng/1488.htm

Is there a reason for not using all the use they can get from it? A more jaded person might think they did this to make performance in some apps lower and steer people to the MacBook Pro line. The reason for the question is that I wanted to run After Effects CS3 on my new MacBook, and it does not offer the extra OpenGL that comes with 1.5. Does not mean that I cannot run it - just not as well.