Energy Star reports simply list SEER/EER and HSPF. Heat pumps perform differently depending on the outdoor temperature. When I was sizing heat pumps for my Portland house I used degree-days data along with the Energy Star rating of my existing boiler and the setting of my thermostat to determine how many BTUs I used. Any response I get here might be anecdotal, but the response could still be cross-referenced against degree-days data.