Ihave a t62 on mine and am very happy with it, even with the lower compression pistons I have never felt lacking on the low end.
My take is that guys looking for the show or wow effect prefer the twins. My experience is that I can spin the tires out of the blocks with my single if I floor it. So a twin setup wouldnt be any advantage in my perspective.
Well one place, if you were road racing the twins might help, if you are road racing you have to be mindful of where the boost comes in particularly in the curves. Twins might make it easier to anticipate when and how the boost comes on. When I am driving I have to be careful that the boost doesnt kick in when I am in a curve or cornering.