Apple announced
18% of Macs are using Snow Leopard in one month. There is
another thread here in the lounge about traffic dropping. We initiated the Mac OS X 10.6.x forum here at FineTunedMac in anticipation of a heavy traffic load associated with the upgrade but there are only 18 topics and not all of them are problem related or even Snow Leopard related.
I have been with OS X since the Public Beta and to the best of my memory Snow Leopard has to be the most trouble free and perhaps the most rapidly adopted upgrade to date. A real yawner as far as problems go. Not that I am complaining you understand, quite the contrary!