I tried Meathead's technique last night on a 1.5lb ribeye and was VERY pleased with the result. I salted the ribeye and let it sit for around 1.5 hours.
I then cooked it low & slow on the wsm at 210 until it hit 115 (about 40 minutes). In the meantime, I got hot coals going in the OTG, got the GrillGrates hot, and actually used them upside down to try to get an overall sear instead of just grill marks (after reading about that idea on Meathead's site). When the steak hit 115 IT, I moved it to the OTG and seared it for 3 minutes on each side. I was planning on searing for 4 minutes per side, but it looked ready at 3.
For a first try it was excellent. Probably the most tender ribeye I've ever done. Two or 3 bites had a weird flavor to them. I can't figure out where it came from but my best guess is that it may have come from using the bottom of the GrillGrates. I'll probably try a couple of different ways in the near future, one with the GrillGrates right side up and then with a cast iron skillet on the grill for full-surface sear. I'll experiment with minor tweaks, but dry brining followed by reverse searing will now be my go-to method for steaks. Thanks for the heads up.