When I said 5% I meant take what sng wizard gives you and shove 5% more.
From what I've seen you can probably tighten up the default calling ranges that program gives too
eg - utg +1 in the screenshot jeff posted - says he's calling off 8.7% which is 88+,ATs+,KTs+,QJs,AJo+,KQo. I don't think many people call off KTs and maybe a few other hands in that range here.
edit - and the BB - 22% = 66+,A3s+,K7s+,Q8s+,J9s+,T9s,A8o+,KTo+,QTo+,JTo. I doubt even renrad who is a decent reg from memory is calling off all of those hands..
8.7% is also this according to wiz

And I agree that you can should tighten up the default ranges, but that is also assuming that most people are good at poker and understand shove fold. Typically they aren't too far off. If you tighten up the BB to 13%, it's still a -$ev shove, but just slightly under neutral. Based on Shags last post though, you could probably give him less than the default -.05% edge based on chip counts. If he has no edge, he should be pushing neutral to slightly -ev spots.