AMD Shows Deneb (Phenom II) pictures of 6.2GHz CPUz etc

[informal]

@Practicability
AMD and Intel have equipment that cant test far more efficent and faster then anyone could do with hand. (just a example)
AMD and Intel have the means to do it, if they do it is another question.

It's not the normal testing procedure.You can't do it any other way but by hand(LN2 testing).Since it takes a lot of time,like it was posted in previous post by bldegle2,it's highly impractical.They might have done what you suggest for the "normal" chips they showed(air,phase,wc-but we know already most will do ~3.6-4Ghz on air).But for LN2,even testing 5 of them would be impractical(they do have regular jobs there after all ,the ones that have nothing to do with LN2 testing all day long ).