They did say at the end of the show that they were only testing in a specific rpm. So while at cruising in town speeds and rpm range the loss is much less. But as you increase rpm and load the power loss becomes much more. If you are going to car shows, the market, parts store I think the hp loss is minimal with a belt driven fan. But for the guys who are running their rig at the drag strip, or street racing where you're up in the rpm's you are just killing hp and I think we can all agree that is not the time you want hp sacrifice. There is a risk with either way you go wether it's a belt breaking or an electrical gremlin. Like its been said before, your rig run what you want. But if you want to keep the h.p go electric, if you are just driving it for more show then go run a belt drive.