I'm all for getting commuters out and on the road, even it means more e-bikes and e-skateboards. That said it's about the exact same speed. I have a cruiser deck with longboard wheels and ceramic bearings, when you factor in traffic lights I usually wind up catching up with Boosted Board users (talking about SF traffic here). Now where Boost Boards can beat me is a long stretch of road with no traffic or lights, but that doesn't describe most urban commuting.