Nonsense. I will take myself as an example. In 2003, I bought a 2 GHz dual PowerMac G5. It was bundled with MacOS X 10.2.7. Since then, I have purchased MacOS X 10.3, 10.4, and 10.5. One Mac, four purchases of the OS. I think that there are a lot of Mac users like me. In fact, PPC-based Mac owners are angry that we will not be able to use MacOS X 10.6 on our current machines.
In the Windows community, OTOH, many users upgrade their OSes by replacing their computers. One PC, one OS for the majority of the user base. This is why I demand data to support your assertion. Absent supporting data, it should be dismissed as a wild a$$ guess.
I would be quite happy in assuming (Weather you like assumptions or not) that you are not in the majority in all of your OS upgrades.. To be frank 2ghz PowerMac G5s are pretty dire machines by todays standards, and i'de bet (Or at least hope) people have moved with the times by now..
It also seems you're happy to say Mac users upgrade their OS frequently, but PC users don't.. To be honest, due to the market of custom build PC's alone, it allows far more people to buy a machine with nothing installed (Or something cheap installed), and pick and chose how they please.. Where as if you buy a mac, it WILL have OSX installed on it..
The argument for Vista sales being null and void in "the bigger picture" because they come preinstalled is still daft, because that argument holds more true for Macs than any other computer platform.. you can't buy them with anything else!
Oh and lets now not forget Bootcamp - So mac users are contributing to the figures too
You really dont need figures to back up common sense.. There are more things capable of running Vista - It's really not as bad as the internet bandwagon makes out - It shouldn't matter if the figure includes pre-installed sales or not - It sold far more - You really dont always have to be pedantic on the Internet to justify your Mac Purchase.