What i said was that all those new games dont use all of the cores at 100%! Each and EVERY core is being used at around 40-60%.
What are you on about, nothing utilises quad's? No, they're arent many apps that utilise quads, but some do like Adobe after effects, Premier and other video encoding/editing software. As for games, all new games utilise quads, World in Conflict, UT3, Crysis all do! I could run them all show you a nice screenshot of them but heres one of UT.
http://img132.imageshack.us/img132/430/96844057ar7.jpg
Frame rates, when everything is on the highest settings the frame rates drop to around 40fps and thats not good since the game becomes almost like there lag. I have world details and textures as 4/5.