Re: which linux?
Hm I just checked Fedora Core's 4 kernel to verify my so far unverified assumption that they don't mess with it that much anymore.
2.6.13-1.1532_FC4 has 106 patches relative to Linus/kernel.org 18.104.22.168, not counting the .4 patch itself.
The recently checked in 2.6.14 only has 93 so far.
I wonder why the things looks more solid. In the case of 2.6.13 you could argue that the Linus kernel was actually screwed up.
In any case, the Ubuntu kernel on my notebook didn't leave one stone on the other, so FC either has a point with the patches or they are more careful not to mess up things.