I went to Best Buy today to window-shop and check out the iPad Air a little. They had the iPad Mini and the iPad Retina Mini on display. I compared the two and really couldn't see any difference, not even a tiny bit. Same when I tried to compare the iPad Air and iPad 2 for speed. They seemed to load as quickly as each other. Does anyone notice the difference? Do I maybe just need to play with them for more than two minutes?