In terms of torque I find it easiest to compare riding with assist on vs. off. My (admittedly short) tests showed that we could climb nearby hills without dropping down from our largest front ring (triple ring setup). Without assist we have to drop down to make the climb.
We have to pedal with effort but not dead leg feeling effort. There is no "pulling" ot torquey feeling, only thing I noticed is the hub sounds louder on the tougher slopes.
Have to imagine 250 is plenty on a single rider. We averaged 18mph on the 20 mile test route and that was clothed for winter (always ride slower in cold weather...maybe 15mph). Biggest difference along with the faster time is a lot less sweaty which is ideal in cold weather.