Whoa, I didn't think I was going to get that many replies. Before I reply to my own thread let me first say that I'm not in the PC camp or Mac camp. It seems nowadays people have a side and you must be part of one. I own Apple products and I also own PC and even Android products too. I love technology and you could say I defend both sides of the fence and also give credit where credit is due. Why, because I can specially when I own products from both sides. Now that I got that out of the way let me say this...
Those saying that "it's because of flash" I think is a ridiculous excuse to justify the heat temperatures. I've used new modern PC laptops with Core i7 Quad Core that never reach 80c under full load. This is using a popular software called Prime95 to stress the computer to the max, something that not even Flash can do.
I have also built many PC's (including Sandy Bridge) and have overclocked them and done major stress tests and none ever reach over 80c. Here is one my one of my recent Hackintosh builds -
http://www.youtube.com/watch?v=-ctk-f1qdMs and I will gladly make a video showing temps under full stress. I know some of you will say "Well, that's a Desktop not a laptop" and your absolutely right. However, the Core i7 max temps are 100c before it starts to throttle down.
Can the processor run at 90c or even 99c, sure it can. Will the processor get damaged, probably not. However, your greatly decreasing the longevity of the processor. Instead of lasting say 5 Years, it may only last 2 years instead. Not to mention the OS freezing up, It's like running your car at wide open throttle everytime you drive it, your not going to damage the engine right away, but you are stressing the parts everytime you do that.
I just hope Apple re-designs their Macbook Pro lineup because I truly like their computers and clearly this is a ventilation issue for having a solid bottom piece.