Think about it this way, watches are like jewelry for men. How many times you complimented a girl for a bracelet she was wearing? You may notice it, but hell, there are other better things to compliment about.
From what I've seen they do notice. I have received zero looks/compliments on the rep PO or the gen Tag (well one and only one on the Tag). However many women have commented on my blue Mako XL. It's okay but certainly not a stunner. Almost every time I wore it out (on leather) someone would notice. No love when it's on the bracelet.
Watches attract gold diggers if that's what you are into.
As far as compliments go... All my DLC'd PAMs were complimented by men and women.
Now if you are looking for a chick magnet... Go walk around with a puppy.
Walking my GF's miniature poodle around I get sooooooo many smiles and they also walk up to me rather than the other way around. It's ridiculous. If I'm ever single again I'm getting a small dog that looks like a puppy forever.