I remember reading in an interview that one of the contestants did, and they said that Jeff reads the votes in the voting booth and puts them in the most suspenseful order before returning to tribal council. But really, I think its so he can memorise the tally, so he doesn't sound like a fuckwit when he's reading the votes.

There was one episode in some season where Jeff read enough votes for some contestant to be voted out, but didn't realise it, so he kept reading them until it was like 7-1-1. I guess he needs an voting intervention each episode.