This is an interesting thread. I see several things going on here:
1. A lot of skepticism
2. A bunch of people who want to give Chris Doerfler the benefit of the doubt, and have proposed various things the device could do that are useful (power quality improvement, PFC) but none that quite measure up to the story that Chris is making (about the large losses from microsecond-level pulses)
3. A founder of 3DFS (Chris Doerfler) who is actively participating in a thread on the EEVblog, but is unwilling or unable to describe his product in terms meaningful to electrical engineers.
#3 is interesting by itself, because I suspect Doerfler believes that this forum is important. Why else would he waste his time? It's also interesting, because he has not dispatched someone skilled in the art of engineering or in the art of marketing wankery to deal with us.
Personally, I have more than enough information at this point to call this a scam, or at the very best, a product that does some useful things, but nothing nearly as exceptional as implied by the hype. I don't know much about David Roberts (@drvox), but I think he will soon realize that his breathless article was one of the bigger missteps of his journalism career -- if he has not already.
For those not in LinkedIn, here is some info on Doerfler that might provide context. I'm not suggesting that a lack of background in EE is necessarily disqualifying for inventing a new technology that will change power transmission forever, but it might justify an eyebrow raise.