The problem is that the Heatsink that Intel supplies with their current high end Processors is soo ridiculous undersized that you
WILL get into throttling scenarios. Heck, we're not even talking about AVX, which is supposed to get the most heat out of Haswell. And you also have two Xeons model above mine (Top bin is 200 MHz faster) which should consume a bit more power and carry the same Heatsink, so it should be worse for those.
As far that I know, the problem is not only heat itself, but thermal cycles. With all the power saving features plus the fact that it rapidly heats when in use, you can go from around 30-40°C in Idle to 80°C+ during a few minutes in Full Load. These thermal cycles with an heavy delta from cold to hot places stress on materials due contraction and expansion, which was supposed to be what triggered premature deaths during the famous nVidia bumpgate (Remember those Notebooks with integrated GeForce 6150 around 5 years ago?). And is what now Desktop Processors should also endure in retail conditions.
Actually, I'm starting to think than that is a not a mere design choice based on reducing Bill of Materials by using cheap Heatsinks, but on planned obsolescence. When you add in that the paste that they use between the Heatspreader and the die possibily degrades over time, making the deltas bigger, so chances are that it has an overally much reduced life expectancy than other Processors with soldered Heatspreader and less temperature delta due to better cooling.
Remember that these days computers usually last much longer than before, because technology is not superceding them fast enough and even a 6 years old computer may be good enough for browsing, which during early 2000 was impossible. So one of the ways to sell more, is to sell replacement to parts that died. Making more possible scenario choices for them to die could lead to more sales. So as a conspiracy theory, I find it realistic.
I sweared that once I get motivated enough I will make a Thread about an Athlon 64 Venice E6 which had
severe overheating problems starting from around 4 years in use, and worsened over time until overheating protection shutted down the computer almost always during Windows XP boot. I expect that Ivy Bridges and Haswell will get similar symptoms some years into the future.