OK, so another fun review from Tom's Hardware where they don't interpret the data in any meaningful way. First of all they don't comment on throttling at all for the Intel (I'll assume it's not throttling because if you check the temperatures, they aren't hitting the 80C 'throttle limit' even with +15C). More importantly the Vcore isn't dropping by margins of .1V or greater at any points so it's safe to say the chip isn't throttling.
Temperatures between the two are not comparable to one another: they are using vastly different stock cooling of the two chips; the AMD stock cooler is a POS (much like how ATI has cheap coolers on the X800 cards. Why? Because their stuff runs cooler so they can afford to cheap out on the cooling and save money that way).
We already know that the Prescott consumes considerably more power than even the 3800+ chips (and up), so this temperature comparison is only valid for what THG intended: a comparison of the two systems using stock cooling.
If you want an accurate comparison of operating temperatures, first you'd be using the same HSF for both and second of all you'd be using an external, calibrated temperature monitor, not relying on the CPU/Motherboard to interpret it for you.
So, no Winchester is not "hotter" than Prescott, but Winchester's stock crappy cooling is even worse than Intel's crappy stock cooling (personally I would buy a better HSF for either one, especially with the heat they output).
Tom's 'comparison' is nothing more than two separate tests to see if either architecture becomes unstable at 100% load using stock cooling. However he further confuses the matter by doing the tests in an open-air controlled environment.
Furthermore, he's using the second fastest Intel chip (3.6 GHz) while using a chip 3-4 speed grades from the top on the AMD side (3500+). You'd think the logical comparison would be the 3.6 Ghz (second fastest) with the 3800+. There would most probably be differences in the stock cooling between the 3500+ and 3800+ but oh well... This is how THG likes to do it: a random pairing of chips.
Don't try to infer generalizations about temperature or comparing architectures from these tests. The only meaningful results we can get is whether or not either system becomes unstable, crashes or throttles.