I installed two nest non-learning thermostats about a month ago. I can't answer your question, but I can tell you I'm unhappy with the amount of cycles the nest runs -- too many, in my opinion -- 4 an hour, maybe. (Also called temperature swing, or hysteresis)
It is apparently not user configurable, which is baffling. (My old ones, my very very old ones, were fine, and adjustable )
Short cycling a heat pump is less efficient and wears out the equipment sooner, so so much for Google and nest being all "green".
