I think I can explain what we are seeing here:



The G0 stepping is a great improvement for Intel. It runs cooler and with less voltage. The side effect that this community is seeing is that poor quality (i'm speaking in terms of manufacturing quality) chips can now operate within the same thermal/energy envelope at speed bins that their earlier brethren were hitting.

You must always keep in mind that Intel is trying to do the exact same thing we are. Squeeze every last bit of clock speed they can out of the chips they make; only Intel has MUCH more stringent terms of what they consider 24/7 stable then this community does. the G0 stepping was huge because it means that the chips that might have been cache fused and marked as low end because they required too much energy or put off too much heat due to some oddities in their manufacturing. can now be used on the much more profitable middle of the road to performance market. I'm going to guess that this is why the price of the new 6*50 chips is much lower then those of similar speed in the 6*00 lineup.

Boils down to mean that the lower end chips are going to have a much higher chance to be just that, lower end. The large amount of scaling is still there at the high end chips cause they didn't get a bump for their speed by much. There still are going to be some chips on the low end that do well, but your chances are probably much smaller.