Skrilla kind of has a point. For whatever reason he felt like he MB wasn't a good investment for him. So he got rid of it and got something that met his needs. I don't think at any point he expressed any animosity towards the users here or Apple, Inc. Just pointed out that for his needs, XP met his needs better than Tiger.
In return, he got a handful folks that asked why he felt that taking the loss on the machine was acceptable, when he could have avoided it. Fair enough. He was kind enough to respond with his thoughts - he didn't need to justify himself, but he did anyway. From others, there was a kind farewell - also fair enough. But form some, he got a fair bit of flack and discourtesy. Not so fair. There may not have been a lot, but barbs are barbs.
I am curious though - why is there an assumption that just because he sold his MB he was leaving the forums forever? Apple goes much further than just computers (as many of the folks here are quick to complain about). Perhaps there is another item that will meet his needs. Perhaps the OS will eventually have the functionality to balance out or overcome what he saw as gimmicks. Instead, there is an assumption that those who choose to use a PC over a Mac are lesser folks. We need to get over ourselves.
Edit: from a quick look through, he's getting rid of his MB becuase he feels that WoW will play better on it. I don't play, but if he feels that way, fine. No big deal - hopefully the MB will reach the point where it runs WoW to his satisfaction and he'll consider buying one.