I figured as much, a bit of snake oil on the website about 20hp gains. Glad it sounds good though. How much are you selling yours for sir? I'm working on a deal for a new one at 585 right now through a vendor.
FWIW, I was following their R&D thread when they were designing the catback, and they did post those results (and graphs?) in that thread. Many called them out about the gains and they even went back and took off the exhaust and did additional testing and posted the same results when they put the exhaust back on. I was not there when the testing was done and don't know what really happened, but they also released a downpipe in that same R&D thread and said they had no gains from it. I actually believe that they did produce those results when they were doing their testing, being how transparent they were with everything else, although it is very odd because most other aftermarket exhaust companies are producing nowhere near those types of gains.
I plan on purchasing the MAP exhaust when I am ready (~2 months), not because of the gains but because it is my favorite design (I like the straight through muffler and that the tips don't stick too far out the back like Cobb), looks the best and is one of the best sounding, in my opinion. When I purchase this exhaust I do plan on doing before and after vdyno comparisons although you will probably have already made a decision by that point.