None of this changes that fact that the quality of the kit doesn't have to do with how accurate the power rating is, given that you won't get the same power output on different engines from different engines manufacturers, and crank vs. wheel HP. Wheel HP is different also, you'll get different drivetrain efficiency losses on RWD, FWD, AWD, etc. So a 100 shot isn't going to give 100HP on all engines, all drivetrains, all altitudes, on all dynos, etc. Saying that a 100 shot gave you 115 HP tells absolutely nothing, and someone with with a different car will get different results. Again, can you really base the quality of the kit on the jet size that they give you, instead of the lines, fittings, etc?

If you're really worried about getting the most power out of a given kit, get the kit with the highest quality components, and then buy the jets that give you the power output that you want, after you dyno it the first time and have a baseline.

I could make the shittiest quality kit on the market, put oversized jets in it, and you'd make 175 HP instead of the nominal 100 HP I advertised. Does that make my crappy nitrous kit a quality product? No, it still makes it a piece of shit but with jets that are bigger than the competition's 100 HP rated kit.