BINGO!
You just touched on something I'd forgotten...
Steve Jobs cranked up the Reality Distortion Field to epic proportions when announcing that Apple was switching to INTEL because Apple needed to keep those PowerPC sales going strong since the switch was many months away from being completed.
And Steve Jobs made lots of false promises in hindsight to keep those PPC sales going.
On the software side, outside of MacOS X, Jobs kept most of his promises.
But, with Snow Leopard, Jobs clearly pulled a classic Lucy/Charlie Brown football play.
Anyone who owns expensive PowerMac G5s understands my gripe.
10.5.8 is NOT the final BUG FIX for Leopard.
Snow Leopard is, but 20-33% of Mac users will never get those bug fixes.
Maybe 20 to 33% of Mac user have at least one PPC Mac somewhere, but if you refer to those who use PPC Mac as primary machine there is no chance that 1/5 or 1/3 of install base is PPC. No way. 1/10 maybe. And if we take Power Mac it's <1%.