Tinkerdude posted an amazingly thorough review of the problems and showed exactly where the problems are occurring over at the dell forum. Unfortunately it was censored by the mods (I'm guessing because he included a reference ID).
He added a pdf copy of his post here:
http://imsahp.chambana.net/~randall/dell
I would give it a peruse.
By the way I have also run the test and I am having the exact throttling and heat problems everyone else is, no dust or any other issues I can find.
By the way I have a send in warranty. The only problem is I've installed new RAM and HD and I can't get access to the originals for a few months (they're in another state) will Dell repair my laptop still?