Percival P. Cassidy wrote:
At least one thermostat (a Honeywell costing approx. $80 at Menards,
but I don't recall the Model#) is claimed to "learn" how long it
takes to get the house to the required temperature at a particular
time and adjust its switch-on time accordingly. I had one in my
possession for a couple of days but had to take it back because it
doesn't work with 2-stage furnaces.

All HVAC dealers carry 2-stage Honeywell stats, or you can buy one on the
internet (and perhaps pay more...).

http://www.honeywell-thermostat.com/...thermostat.htm
http://www.honeywell-thermostat.com/...thermostat.htm (its NOT
really pink)