Not as scientific, but last night I filmed a 0-60 run in my DSG GTI with a DTUK FSR+ box set on 2+3 and got around 5.5 seconds every time - traction is the main issue now, so no point taking it any further with 2wd IMHO...
With 4wd the time would have been close to the stock R I reckon...
Thanks Andrew, the box is great - looking forward to hearing about the dyno runs with the S1.