Late to reply, but I just had a few beers with our realtor a couple of days ago (ran into him) and asked him how things were. His office is generally getting 10-12 calls per day with "you got anything coming up"? He's got probably 1 every two weeks that effectively doesn't hit the market and sold above asking price.

Again, it's anecdotal and maybe it's happening less now, but we were routinely getting shown houses before they were listed when we worked with him.