Well, I gave in to temptation (that didn't take much!!) and bought one. Carpe diem and all that stuff.
To answer my own question above, I can get my fingers around it cigar-style, but it's not very comfy or stable. It works better with a "modified" cigar grip, with the middle finger and index finger both on top.
It's brighter overall than my Fenix L1D-CE on turbo, but the L1D may actually throw a bit more. Hard to tell indoors, and it's not dark yet. The spill of the RR is much brighter than the L1D spill.
It's actually a really nice beam. It reminds me of the full-flood mode of the MiniMag LED, but without artifacts.
Strangely enough, the flood area isn't as large as I thought; it's similar to the L1D. I thought it might light up a larger area with the larger head, but I suppose it's due to the emitter being buried deep in the reflector.
The only thing I don't like about it so far is that the switch is very very soft. It barely takes any pressure to activate the momentary mode. For pocket carry, it definitely needs to go head down because it's own weight is more than enough to activate the switch in a pocket.
All in all I'm pleased. If these do go on sale, I may get a few more as Christmas/birthday gifts.