That's not how I remember it. In fact, Snow Leopard was no less buggy than any other release, I'd say. As explained in the article, that mythology of a stable release was formed over time later on.
Of course 10.6 got better over time, and 10.6.8 was the best release of them all, and it was followed by Apple's answer to Windows Vista. But that doesn't mean 10.6.0 sucked.