Has anyone taken pressure and temp readings while its in defrost with the indoor fan running, and without the indoor fan running.
Is that other guy comparing a unit designed/made to defrost without the fan running to your unit which is designed/made to defrost with the fan running.
The Japanese brands are designed to shut off the fan, your Carrier isn't. With the indoor fan off, your compression ratio is higher the longer its in defrost then if the fan was running. So the compressor uses more electric during defrost, and will run in defrost longer.
Keep in mind, that the COP in defrost is not as high as you were told it would be. Since the indoor coil isn't getting a full head of liquid. You can listen to the refrigerant flow, and hear the surging. The surging will be from vapor entering the indoor coil along with liquid during defrost.