The wait is finally over. I found a US distributor of Greenspeed tires (in-stock today) in
Calhoun Cycles.
As you may or may not have heard, there's been much hype surrounding these tires, and soon I'll get to debunk a bit of that hype with some real-world, two-wheeled, folding-bike commuter mileage (these tires have so far only been reviewed mounted on trikes).
The Scorchers will be replacing my already-fast Comet Kevlar 20x1.35 tires, and after putting over a thousand commuting miles on them, any performance advantage/disadvantage from the Scorchers should be pretty apparent from the get-go.
I'll keep you posted.