Yeah, I've noticed that quite often. If you happen onto the profile of pretty much any woman that's above average attractive (and quite a few that aren't) you get that. I don't think the same is case for the men, though perhaps I'm just blind to what women finds attractive in men...
I used to get really upset at the large number of local recruiting firms that used a revolving door of attractive women fresh out of college to work as external recruiters. They were energetic, friendly, and it's a lot harder to say no to a sales pitch when they're at your office door and smiling.
Now I can see that there's a secondary use for an attractive LinkedIn profile picture as well. That might have a lot more leverage than cold-calling offices these days.
