Why is it so difficult for anyone to understand that Apple was working on BOTH products at the same time ! We aren't talking about 2 different companies and we aren't talking 6 months apart either. They have been working and planning both for a long time. So ....WTF , why not incorporate the 512mb of ram in both ?
I don't know why your making this such a big deal. Have you even gone to an apple store or even a Best Buy and tried it out? As many said it's really fast I dbout 512MB would make it noticeably faster. May be a tad bit.
Maybe they were keeping the 512mb a suprise?
For what? Unless a major feature like a camera or a thinner bezel (not too thin but enough so we can still place our fingers on it) I don't see it being a surprise. Not many care how much ram it has.