Isn't it right that (twin)turbos have to be driven more "safely" in terms of warm-up periods before asking for full engine power?
So it might be that - depending on your personal way of driving and also on average driving distances - the (twin)turbos don't fit well with your personal profile.
In my case, that's why I worry a bit about the twin turbo diesel I just ordered. I drive a lot of time just very short distances with no chances for the engine to heat to a proper level - however, I still like horsepower and newtonmeter working for me from the very first second...
... i'll see how that works out.