Technically, Ken M is correct; the 4:1 ratio going from 44T to 11T reduces torque by 75%. However, it is also very misleading. The 75% loss doesn't apply to power, only torque. Power is proportional to torque times speed, and the 44:11 ratio multiplies speed by 4 while reducing torque by 4, maintaining power*. He also didn't mention that hub motors also lose torque at higher speeds, otherwise, their power would be proportional to the speed. To see this, bring up any power curve at https://www.ebikes.ca/tools/simulator.html.Ken, I don’t fully buy into your premise that mid-drive motors deliver only 25% of their power (i.e., torque) to the rear wheel. For example, I ride a 52 lb. bike with a Bosch Performance Speed motor with peak torque of 62nm.
Torque is important for starting out or going up steep hills. Power is the relevant parameter for traveling at higher speeds.
* The transmission does give some power loss, but it is on the order of 7%, not 75%. Google "bicycle transmission efficiency" for more information.