OK, my $.02, which is about what this is worth.
After installing my full Remus system, there was no question that top end was improved. When I added the foam air filter from BMW of Atlanta, the midrange felt more responsive. It's not seat of the pants. I just dynoed the bike and got 119hp. Even if this particular dyno was a bit optimistic, the numbers would still be better than stock.
Of course, the bike would run better with some fuel management, but I think there is "some" compensating by the stock electronics.