No one can dispute that. I have heard (but not confirmed) that, depending on the country of origin, the cat box may be empty on some Touring models. If so, this means the exhaust is free flowing from the headers to the silencers (pipes). While a "free flowing" exhaust is certainly not the same as a custom solution, it does offer an improvement from cat restricted / baffled exhaust when tuned correctly.
The issue is tuning it correctly. This may mean dyno runs. I wish there were some more variables with the maps supplied on the TuneECU site (i.e. D&D slip on with K&N under seat... with or without baffles) but the menu is a little limited. I've been spoiled by having a large number of Power Commander maps available for my last bike (Honda VTX 1800).
I'm not sure a 12 minute tune with substantial changes to intake and exhaust pressures would result in a smooth running motor with no exhaust popping. Anyone have map suggestions / experience with 12 minute tune and D&D w/o baffles?