Blah Blah Blah
The 18Z in the picture had to send all 14 ACOG's back for various reasons (canted reticles, bad fiber optics, etc). That sounds like a 100% failure rate, but I'm not going to make the generalization that all ACOG's are shit because 14 of them went tits up.
Dollars speak louder than words. Departments/agencies/militaries are buying EOTechs and officers/agents/soldiers are chosing to use them.
I'm not saying Aimpoints aren't any good (they're very good), but it comes down to what works best for the shooter. In it's original configuration, my AR had an Aimpoint. After shooting a friend's rifle with an EOTech, I switched over. No big deal.
18B should have been sending them back instead of 18Z; Z has more important stuff to do but I digress.
That is by far the worst account of ACOG performance I have heard, not to say it isn't true. The only truly broken ACOG I have seen out of over 100 was one was dropped in a manner that the glass shattered on a pointy object.
FWIW- I don't use Aimpoints either because our old M-68s had a high failure rate too. People seem to love the newer Aimpoint products though so maybe they figured out how to improve reliability. Hopefully EOTech has/will do the same.
Dollars do speak. So do testimonials of people who have spent their dollars to buy them and had bad experiences. These testimonials speak louder than the advertising dollars of a company trying to sell their product. Companies also hype up their gear to get lucrative Government/Military contracts. While a great test bed this can lead to finding faults in equipment quickly. Not everything that makes it to the front lines goes through a rigorous evaluation process.