So let me get this straight as Tom has stated in his most recent video review the only difference is 4.8Ghz on Ivy bridge and the equiviliant is 4.6 Ghz on Haswell. And with a top of the range CPU cooler you will hit 90 degrees with a big overclock. So IHS issue again with the Ivy bridge CPU's.
Intel doesn't like people overclocking much do they?
Pay premium for an unlocked CPU and then there was that daft overclockers insurance from them.
And then release a CPU with really bad temps for overclockers.
This is why I am tempted to upgrade to Sandy bridge, I know behind the times slighly but frankly I enjoy my overclocking.
Unless something changes, I won't be changing my mind any time soon.

And yes I know Tom had an engineering sample so the final CPU released to consumers maybe slightly better temps wise but I doubt by a good marginal better.