Any dyno can throw a number, it is all up to the operator how everything is set up. I bet ZG's bike could put down 150+ on another dyno, it is the before and after dyno sheets that show how much of an improvement was made. IIRC Wanderlust (Aussie) posted a dyno sheet from his dual Muzzy setup that was somewhere around 162 hp. I don't worry about numbers very much, it is a tool and that is it. Just my 2 cents.
+1 to Jeremy's point, the number that means the most is what you gained on the same dyno in same conditions etc. I did a base line run on this same dyno just prior to going to a full system and got 133 with stock header and Muzzys slip-on, going to a full Muzzys system, PCV, flies out, and K&N gained 14 hp. Gaining 14 is more than a 10% gain and pretty spot on for going to a full with PC etc. Temps, humidity, calibration of the dyno etc all change what the numbers will show, I could probably show 160 on somebody else's dyno but then again that dyno would also probably show stock at 148, which we all know is wrong... The Kawi specs show the stock Connie at 133, and that's what mine did on the base line run prior to going to full system run, so I feel pretty confident in the dyno being done accurately on my Connie.