Fuser wrote: "Who cares if 380MB of RAM are required to load up 8 sites at one time?"
Well, I do. First, because it's evidence of embarrassingly bad coding. That equals over 40Mb used for each web page. What on earth is the software doing with that RAM? It's like watching a guy paint a house with a broom. I guess I don't care if it's not my house, but I have enough pride in my work that I feel sorry for the guy. And I certainly wouldn't buy what he's selling.
Second, like most people I typically have many programs running. If each took 320MB I would run out of ram on the XP (3BG) or Vista (4 GB) limits. I'm not going to switch to 64 bit OS with all the driver and other problems just for the privilege of running a new browser.
Third, RAM pigs usually are CPU pigs too. From these tests it appears that IE8 is no exception. I like my programs to run fast. Maybe you don't care. That's fine. To each his own.
Fourth, big bloated programs typically have more security problems. If the coders write that poorly then they likely haven't found all the holes. MSFT's history and reputation are well-deserved in this area.
Fifth, and most important: what feature of IE8 would compel me to use it? All purchases are a cost benefit analysis. Is there some feature or benefit that overcomes IE8 being a slow piggy program? It's just a browser for god's sake. Does it render pages better/faster/cheaper than FF/Opera? No, no and no.