Well, I can't vouch for the veracity of their claims. It's a mighty impressive bit of kit, though. Riding it I think I can detect a certain loss of efficiency in gears seven and below, but honestly can't tell the difference from a derailleur system from 8-14. Except, of course, that the steps between gears are equal on the rohloff.

As for wear, I've only done about 6000 miles on mine so far, so it's barely worn in. But there are lots around that have done many tens of thousands of miles. And the old Sturmey Archer internal hubs, manufactured to vastly lower standards, lasted for ever.