Aye!
I switched to ReiserFS, because my brother and I simply couldn't play
Quake3 or Unreal Tournament 2003 when every ten minutes, we'd get slowed
to nearly a halt while the hard drive goes nuts.
Plus, I used to get a lot of power outages. Ext3 has, a few times, been
totally destroyed (even fsck doesn't find data) where I have *never*
lost *any* data to ReiserFS, even on two test hard drives that were
loaded with bad sectors. When I switched to ReiserFS, I did so for the
performance, believing all the rhetoric that it wasn't as reliable as
Ext3.