Comment Re:KDE4 is ~30% faster than KDE3 (Score 1) 255
On core 2 duo 1.7, but it's not the issue here probably. Some graphic cards perform really bad on linux, there were versions of graphics drivers that was buggy and slow, I've had issues with my nvidia chipset cause nvidia don't gave a frakk 'bout quality of their drivers for linux...
So yes there was significant (and probably still are on the newer chips) performance issues but they have nothing to do with KDE nor Qt itself. And as I previously said there was significant performance boost from Qt4 itself (you can check troll's benchmarks if you want), so it should be noticeable. Also I've noticed that Kubuntu tends to have more issues (at least 4.2 had) than others, I recommend openSUSE, it have great support for KDE (traditionally).