Crunch the numbers all you like, our brains couldn't care less. There's really no way to look at graphics objectively - it doesn't matter how many terraflops you've got, if it doesn't look good, it doesn't look good. Put up pictures side by side, compare the differences, people will pick the older generations as bigger leaps every time. Why? Because, as it matters to us, the gamers, and our experience, they were bigger leaps. Period. The numbers don't support that, but they don't have to. It's simply not relevant, only what we see and experience are relevant.