The overheating conjecture is hardly out of the realm of possibility. Sony has already had issues with manufacturing this generation. Everyone seems to forget that when Sony started to manufacture the PS3 they were running behind schedule with difficulties, and they were still suffering from some problems up to half a year after launch, and these statements came from Sony themselves. When they thought the issue was going to be meeting demand.
So if you are under the illusion that Sony hasn't had problems. You are very sadly mistaken. That in truth actually means that Sony has probably overlooked a few steps in quality control testing, and they also could have lowered their component standards. In order to make deadlines, because lets face it they needed the slim this year, and they needed a good amount of them to exploit the new price. Otherwise their whole strategy to get back in the game would have gone to the crapper in a hurry.
I am sure Sony ran through the numbers on paper. However I am sure that Microsoft did that to. The problem is that paper gets undermined by people. When you have deadlines it is so easy to compromise the recipe to get it out the door on time. Sometimes don't leave tolerances for lower quality components that can slip into production despite their design. It isn't necessarily their fault either when it comes to them being asked to push the limit.
Anyway Sony does seem to be getting to the market quite fast especially when you consider the fact that their manufacturing process was plagued with problems early on in the generation. So I cannot say I wouldn't be terribly surprised if Sony isn't doing a little finger crossing and hoping.







