I'm out on the same limb...I will venture out onto a limb: never in a million years will a VW tdi or any other current car get 150 mpg with any kind of transmission. This guy says his transmission is very efficient at transferring power. So is a manual transmission, and I don't see us getting that mileage cruising in top gear.
Efficiency's one thing, fiction's another. It takes 'X' amount of energy to move a car down the road, and if our tranny's are 80% efficient, how is a 95% efficient tranny going to triple our mileage? It simply isn't possible.
(Granted, he never said that the TDI in a 3,000 lb. car would get that mileage, so he may be talking about a 600 lb. scooter, but to get a car like my Golf down the road at 150 mpg ain't gonna' happen. Neither is 0-60 in 4 seconds, without some serious weight loss and some serious traction.)