Sorry I don't have the exact statistical source, it came from Washington State Patrol data and I suppose you could resource it if you felt led to. But to play it forward you might say the guy going a hundred weaving in and out of traffic is creating turbulance. It's the dynamics of human interaction.
Here's an a video by a gentleman (uber science tech) I know that you might find interesting. Though I don't think he's a hypermiler, it certainly fits in with the mindset.