Or, as is being discussed in another thread, they do what they do to keep costs down (and profits up). Sure, they could give us 1GB of RAM and 5MP cameras, and then they could calli ta Xoom and start it at $799. When you sell 20 Million units of something...a price increase of $5 for more RAM quickly adds up to $100 Million in lost profits.
I agree! Apple will not sacrifice performance of the device, however, they do not want to overload the device with wasted features. Example, optical drive. Yes, we do have it in our mbp. However, I have never used it! Apple has a huge lab. It is not likely that they did not test the performance. Plus, A5 is a patented custom chip. It will take a ifixit to take it apart to see how much ram is in it.