You don't need a link; rather you should already have this knowledge. Otherwise, you apparently don't know enough about modern graphics processing units.
Also, logic in relation to business and sales supports this. Maybe you need to know more about economics as well.
Likewise, I can turn the tables on you and ask you to prove that a 'stock' card, of which you do not even own, and probably don't have access to, won't OC as well as your pre-clocked card.
You apparently missed the part ( and I knew someone like you would..) in my post, that here and there owners of pre-flashed cards have success, but overall, by the numbers it doesn't work that way.
"But...Is the extra $30 worth a extra 25Mhz...Well thats up to the buyer I guess, but it was for me."
I think that pretty much sums up your knowledge of GPUs, and settles the case.
Ultimatley, he can achieve the same clocks himself. There's no need for him to pay some absurd premium, only built for twits or the ignorant. Since you seem to know enough, to challenge my comments, then what excuse do you have for buying a pre-flashed card?
This trend has to stop. It's not only ripping people off, but it's perpetuating ignorance of the general computer consumer mass. We're at a day and age where PCs and computing are far from taboo, where eight year olds can program in visual basic and where overclocking or water/liquid cooling is no longer EXTREME! There's absolutley no reason and no excuse to allow ourselves an our friends or neighbors, to be preyed upon by companies who are attempting to use consumer's ignorance against them. It's a tactic, whether ethically acceptable or not; we cannot change that, they will always use such things. However, what we can do, is educate people and say "NO!"
This is not like buying a car, that has a version B with a larger or tuned motor, to gain a small bit of horsepower or torque. Pointing a mouse cursor, and dragging a slide bar, is a far-cry from manipulating an automobile motor. The point is, it makes at least SOME sense, for someone to pay a premium for a higher quality model of a type of vehicle. It does NOT make sense for someone to pay a premium for a pseudo-higher quality model of a graphics card, in which the user/consumer can make the adjustments they need, by themselves, with little risk or effort in contrast to that of the automobile.
My support and concern for this issue comes from my knowledge of the truth about pre-flashed cards, and that I don't wish to see other computer users and consumers deceived and taken advantage of.
Your support and/or concern is bore out of your defensive position attempting to justify your errored belief and possiby purchase of a pre-flashed card. However it seems you got lucky with yours, and that's good, yet it doesn't change anything; so don't come in here throwing around rebuttal based on such useless intent, where the goal is to help someone, not hinder or harm.