Apple users have just as many problems as PC users.
This is absolutely 100% true...
I've setup/supported both Macs and PCs.
Neither is more prone to problems than the other.
The key is the person who's setting up the machine/s.
* Vista's problems/limitations are in no way Cakewalk's (or any other audio software company) fault or responsibility.
* WinXP runs great in the here/now
* Remember hearing that the G5 was the, "fastest computer ever"? (if you used one... you know this isn't true - rather maketing bo-jive) The 35% increase (across the board) is likely inflated market-speak as well...
* Folks come to this forum for support. Of course you're going to see problems/issues discussed here. I've used every DAW app that exists... and the one thing they all have in common is that they're all imperfect. Logic is no exception
* A fair bit of the problems reported here are the result of inexperience or pilot error. ie: Running a Firewire audio interface with a non-TI chipset Firewire controller. Once the end-user has the knowledge/solution... the problem is gone.
My Sonar v7 experience is nothing like the situation the OP describes.