Just to chime in again, I know it's all about survival early on in a SnG. However, it's also about getting your money in when you are, hopefully, a significant favorite. The reason I advocating moving in PF is because of the description of this player. I would move in because I think, worst case, I have two overs. More importantly, I think many times (maybe the majority of the time), I'm actually up against a weaker ace. In these instances I'm a significant favorite, and SnGs are a lot easier with a hefty stack early. I just think it's too good of an opportunity to pass up.
While it wouldn't suprise me to see something like 88-JJ 30-50% of the time, I think it's going to be a +EV play against this type of player in the long run. If you're not playing in SnGs that are beyond your BR, I think this is a good opportunity to get a lot of chips early. If he has even a pair and I don't improve, I just tip my hat and move on, but I can't lay down this hand since there are really only two hands I'm scared of and a good chance he has a dominated hand. Just my $0.02.