I'm impatient. But the upside is that I have a personal anecdote to share. Last week, I purchased a dual Heat Troller and First Gear (Warm 'n Safe) heated gloves. The install was easy and I ended up just using industrial Velcro (black) to hold the controller to the bike on the fairing above my left knee. When I rode with the FG gloves, I noticed a hard and very hot spot in my thumbs - the left one in particular. It was bad enough that it left a mark for a couple of hours. That said, I felt almost no heat in the index finger. Lastly, the rubber wiper blade which is sewn in to the left hand index finger hits the clutch lever when shifting and creates an odd feel.
I returned the FG gloves and picked up some Gerbing's. I tried on both the G3 and the Classic and, even though they are little bit more bulky, I liked the feel of the Classic (not as stiff, better fit, articulated knuckles good). The heat feels to me to be more radiant and even. Not hot spots. No sense of hard wires on the hand. The WnS Heat Troller works fine with the Gerbing's gear, FWIW.
That's it - just wanted to relay a recent personal experience relevant to those of you about to purchase heated gear.