Can anyone confirm these rumours?

Some people are claiming that the new ATI drivers force overheating on certain Radeon cards, and some are saying that it's slander in favor of a sluggish Nvidia. You can take a look at the source of the post below:

http://www.icronticforums.com/showth...&threadid=2752

If anyone could confirm whether or not this is really happening, it would be really appreciated. Thanks in advance.