The path I took, which doesn't seem far from the directions given in the article didn't have many options for gear, with run outs of around 100' I would guess. I would give the climb an R rating because of this. Aside from this the climb was great fun.
Runouts of 100 feet mean half a pitch without placing any pro. That does not match my recollection of this route, but sometimes, when the climbing is easy, one is inclined to "run it out" rather than spending time looking for where to place protection. In sum, while all east face routes on the Flatirons are runout to some extent, when I think of R routes on the Flatirons, definitely this one does not come to mind.