With 1,2, power button, overdrive button, and a few functions to play with the shift points, you do actually have a bit of control over the gearing.
I'd even say that my auto powered RB20 has similar lag to a manual. Overdrive off, power button on, 1 into 2, 2 into drive, you're accelerating pretty quickly. Rev the crap into it, it holds that gear and drops only a tiny bit more revs in a manual (and a shift kit would be useful there).
I think you maybe need a ride in a fastish auto with somebody who knows how to use it a bit You might be surprised. Where it is not so good is cornering, but again, the 1, 2 selection can play a part there.
But for the track, or in the mountains, a manual is definitely less frustrating in being able to get the control you are after.