[citation][nom]OMGcoreI5[/nom]If you use the comments on newegg as an indicator of sales, PhenomII was released well after i7, and now has caught up with i7 for number of comments(as well as an equally good feedback rating). I believe Intel is still trying to find a way to make these not run @ 80c, and that is also probably also the reason for charging $300 for mobos(intentionally crippling sales), since only enthusiasts would pay that much, and enthusiasts won't really complain if the CPU/mobo only lasts a year. Anybody who thinks a CPU can last longterm at those temps should have his/her head examined.[/citation]
In contrast to Hurom I do believe comments can indicate sales numbers, if only roughly. But for the rest of your post I can't say I agree.
Last week I was at my aunts place. She's got a prescott 3,4ghz running at approx 75-80C which has been doing fine really. The computer's running more or less constantly, and it still hasn't failed (except for the psu which I was there to replace). Also I've got a celeron 2,2ghz (478) that is run completely silent. No fans or anything. The diode below the socket does show 70C under a medium workload and peaks in the low 80s. Admittedly I'm not using it much, but it hasn't broken down, and last time I checked it could still do a 2 hour prime95.
And once in the old days before I frequented tomshardware I even ran into an athlon MP that operated at almost a hundred degrees (~93-102C) due to a questionable working enviroment. BUT IT KEPT WORKING.
I haven't cooked a c2d or i7 cpu to see how well it works, but my old e6600 (@ 3.4) does get past 60C under heavy workloads (because I haven't cleaned any fans or heatsinks since it was new), and it's still running too.
In short - 80C is going to last you longer than the warranty, so intel has no reason to worry about it even if enthusiasts generally shy away from operating temperatures in those ranges.
ps. a barton 2800 doesn't like too high temps - that's the only chip I fried in my time, and I don't remember how many years back that was. I hadn't clipped the heatsink on properly.