I've got about 75k miles on my RE92s and the shoulder tread is just now about flush with the wear bars; it's about double that in the middle, maybe 3/8" tread depth...
Just to reiterate what's been said, the 165-65-14 RE92 is different than RE92s in other sizes, most of the reviews will be for the others.
Personally I think the RE92s handle quite well for their size/class. With moderately stiffer springs, GAZ shocks at rear, and polyurethane rear bushings in the control arms, I can push the car hard through turns without losing grip. Before these mods the car would feel scary way before the tires would... My guess is that anyone in an OEM configuration would chicken-out before they've pushed the tires near their limit...