If I enter our Old La Honda HC, 390W, 280# riders, 23# bike, 17# gear-water-shoes-etc. 3.0 mi climb at 8.1%, it comes right out at our sub-26 minute time. And compare that to a chain tandem at 1W more power considering the belt is NOT at 80 psi, and 100g heavier for chain, I'd save 2 seconds (a full 2w loss comes to 6 seconds). 1/10th to 3/10ths of 1% saved. I think I would call that vanishingly small. Maybe not equal to 50g, but equal to the gains in responsiveness of the belt when we stand, and far less than, say, a good pair of cycling shoes or tires. We agree, the report is making much ado about nothing.