"Squishy."
OK! He said they are thicker than his usual socks (yeah) and that they have a little more squish to them, which is comfortable. Maybe I have a convert? He also said they were rather warm. And he was a good boy and showed them off at work. And Pumpkin has enjoyed running around the bedroom with "daddy's socks." All in all, a success.
More footwear, this time in the Baby Parade of 2008:

The pattern was a little wonky at times, but once I finally was able to project the finished bootie in my head, I was able to figure it out. I had to knit a little on blind faith until then. I was going to do this set over again for another friend, but I don't think I have quite enough yarn for both hat and booties. That's OK, though, because this way each of my friends can get something different for their bambinos-to-be, which oddly enough, equalizes things.