Oly sells the heck out of their AR15's and parts up here in the PNW on a scale of 1/10.
I don't see the great masses stopping by Olys table (and the other vendors who sell Oly products) telling them they sell crap.
What I think is that more than anything else it's an east coast (Bushmaster, Armalite, Clot) vs west coast (Oly) thing.
I have owned Oly guns that have had problems, one was a Palmetto Armory / SGW machined lower that was out of spec.
$95 dollars to Oly and I had a remanufactured forged lower that accepted my Clot M4 upper with no problems.
I bought a "problem" Oly from some guy who didn't want to listen to me when I told him that his problems were being caused by an out of spec lower.
I paid less than $500 for it, $95 to Oly and a feww weeks later I had a new forged lower that accepted the Bushmaster upper with no problems.
Oly customer service has never been anything but helpful to me, and has gone out of their way in one case.
I am not arguing the point that Clot, Bushmaster and Armalite make "better" rifles, just saying that Oly products do not deserve the crap they get from this board.
I'll bet that a lot of companies use Oly parts in their rifles.