I'm a PD150 owner, and can honestly say that its one of the quickest cars I have ever had.
I've never been a fan of the 0-60 bench mark, as I don't think it represents real world driving. If you look at the in-gear benchmarks (a much better indication of how fast car is) you'll see that the TDi models are seriously rapid.
Read any of the car mags and they will tell you the PD150 is the quickest of the GTi models. The PD130 is as quick (if not quicker) than a 150bhp petrol turbo.
Give one a test drive back to back against a petrol model and you'll see what I mean. All that and considerably better economy too!!!