In my opinion, it's not about the extra 3 or so MPH. It's about not being abruptly slowed down during the only element type the ride has. When comparing my multiple trimless rides Saturday with my many trimmed rides in previous seasons, I think an Intimidator ride where it's running a few MPH slower than normal and not activating the trims (if that is indeed what's happening here) is better than a trimmed ride running a little faster up the hill. But that's just my opinion.
One more thing: I'm not sure it was running slower. It seemed to be flying along pretty good. But maybe that part is a psychological thing.