I'm starting to give a second thought to those dot type sights after seeing so many rifles with them and no irons, I have only had experience with sub $100 dot sights and they all left me frustrated. I still can't see the advantage they have over irons besides being able to keep both eyes open, but I can't agree with the lack of easy adjustments for elevation and windage. Every video I have seen online of eotechs/aimpoints/etc seem to be fairly accurate, hitting what the user is aiming at but still seam to leave fist size groups
The Aimpoint T1 is 4MOA - 4" @ 100 yrds if I understand correctly. You can still shoot tight groups but your dot is covering 4" of target at that range. Try shooting on the move to see how great these dots really are (no comparison to the very cheap ones).