That's what I thought too, but I would see the screen flash and the slow down while watching an online clip. My fans are also usually idle.
Just to elaborate on the flash, when I say flash I mean that whatever is on the window under the one I am currently using very quickly appears and disappears and it is off-center, the top left corner of the maximized winndow behind me appears at the center of the screeen.
Tag(thx fkusumot) - "Yet again I completely fail to see your point..."
HD vs Wii, PC vs HD: http://www.vgchartz.com/forum/thread.php?id=93374
Why Regenerating Health is a crap game mechanic: http://gamrconnect.vgchartz.com/post.php?id=3986420
gamrReview's broken review scores: http://gamrconnect.vgchartz.com/post.php?id=4170835