I'd imagine the manual is quicker to 60 as you can run a manual into the red line to get a full 60 mph in second gear (remember indicated is more like 64-64mph at 60) and a dsg box will change up once in the red zone. You cannot change gear as quickly as the dsg does it manually, no chance.
As far as conservative figures go, VW quote performance figures with 2 passengers, a full tank of fuel and fully loaded boot. An extra 1.2 secs to 60 with all that lot on board sounds realistic to me.