1. Even the high-end 15" Macbook Pro is a vast underpowered joke for a crazy expensive price...you don't know what you're talking about. Good for you if you're one of those using a PC for mail, word and internet surfing.
2. Yes the iMac too is a joke, but at least it's affordable
3. You are thinking like I was thinking...5 years ago. Today, what I stated is my conslusion
4. No, PC is not better all-rounder, it is still an horrible un-optimized, bug/crap filled, badly coded platform BUT it is the only valid platform serious-work or graphic/scientific/development-work wise, so it is not even a matter of price but of choice since no Mac has any decent specs.