We've got a 2013 T5 Transporter, BiTDi, 6 speed, 4motion, LWB, HIGH roof - looks like a camper!
We run it fairly empty a lot of the time, and it's driven all over Northland (lots of s**t roads too), and we're getting around 11l/100kms I'd have thought an Amarok would be better, but a good chunk of town driving probably kills the economy. We drive it pretty quick, and do a lot of backroad driving too (front tyres only lasted about 18K

An Amarok is probably quicker than a hilux, without realising you're accelerating harder, because it doesn't sound like a tractor (i do NOT miss our previous D4D Hiace - loud, wallowing, hungry, slow, obnoxious POS!)
(I asume the Amaroks all come with the twin turbo too... I thought they did at launch)