Button order

The topic of #freebsd-gnome on Freenode pointed to this rant about button order. Did you ever reason about the button order on your screen?
I am using KDE on my Desktop, and MacOS X on my iBook. I also mix KDE and GNOME Applications, but i never noticed the different button order. BTW Movable Type uses a Macstyle button order.
There are good arguments for both, but does it really matter?