Is there really any ponit to worrying about temps anyway (from a review standpoint I mean - other than heatsink specific reviews).
We all know that the Prescot consumers much more power than the A64. Simple science tells us that power must go somewhere. The heatsink designers setup their heatsinks to keep the chip at a certain temp, so it should be no surprise that the stock intel heatsink and the stock AMD heatsink produce simlar temps on the chips.
If you really want to see what whether the power consumption makes a significant difference, a good test would be to use the same heatsink @ the same settings and compare the temps of the chips. That is what most enthusiasts do anyway - go buy an aftermarket heatsink and fan and either try to run as quietly as possible or overclock as much as possible or find a good spot in the middle somewhere.
I think all this test tells us is that the stock AMD heatsink and the stock Intel headsink both perform well in the respective applications.
Of course, that strange increase in temps on the Intel system is interesting.
Anyhow, I guess I don't see the point of the test.
-D'oh!