That isn’t my experience either. If I leave it at “11” and then try to use it in low light situations that still isn’t the case.
I'm not even sure why the EOTech has a brightness selection in the first place. Anything around half-brightness is useless outdoors on a sunny day.
It's not just me saying this; there are plenty of soldiers serving in Iraq/Afghanistan on forums all over the web who can't say that they're fond of the EOTech compared to an Aimpoint or ACOG.
Now, I don't hate my EOTech even after having to send it back to be replaced... but I should have understood it was probably best designed for SWAT teams who kick down doors at meth labs and crack houses at 4:30am.