Well that is a good question. For instance when I am playing WoW, it can get pretty hot, somewhere in the 60-64c range. The crazy part about that is WoW is installed on a different drive, so I don't know what activity is going on there. Is it possible the heat from the video card, which is directly above it, is affecting it?
However. when I use the Intel Toolbox to run a diagnostic on it, it most certainly heats up. If I let it run all the way through it will crash every time.
I did check over on their forums, and there are a ton of complaints about the 525 series running hot.