I'm a Vista user. I use Vista periodically (though I mostly use Xp, when using Windows). And I think that Vista is awful. Pretty much everyone I know hates Vista. Most of them have just downgraded to Xp. I don't really care about Apple ads, I care about my experience.
The only time when Apple did user users as beta testers was in the beginning of OS X. (10.0-10.2). That's true. After that, every OS was a stable OS. $129 is a good price. So let's say that 129$ got wasted. Look at what Microsoft is asking for the Ultimate Edition.
lets be honest here, do you really think you can represent most vista users? with your vista using experiences?
10.0 itself is a 100% beta, never been fully patched. every version of OSX has 6 months of beta testing, when Leopard was out, it was filled with wifi dropping, etc, problems and took 6 months and 3 patches to fix.
You may say only a fraction people had problems, and they complained loudly, thats correct, but thats just as true as for Vista users.