I was just in the Guitar Center on the Katy Freeway here in Houston over lunch today to try out the Yamaha THR10C, check out the Epi ES-339 Pro and look at inexpensive acoustics for a coworker's son's Xmas present. While there I picked up at least 10 guitars to try out, and only one of them was even close to being in tune, even some pricier pieces (i.e. SRV sig strat, PRS, etc). It was as bad as a damned pawnshop.
I don't know about anyone else, but if a guitar is really out of tune, I won't even screw around with it. It goes right back in the stand/holder and I move on. In GC, with 10 other people noodling around at any given time, it's practically impossible (for me at least) to tune a guitar by ear.