Flud, you like physics, let me explain. On flat roads and up to 15mph, the motor gives between 5WH per mile to about 12WH/m depending on the rider's fitness. That means that at 15mph, the motor outputs 75W of mechanical assistance to a fit rider (5WH/m * 15m/h) and up to 180W to a very unfit rider, much less than its continuous maximum afforded by law. On a steep hill, the law allows much higher motor power to help with climbing, as long as the motor still cuts out at 15mph. The Bosch CX motor for example can hit 750W output.
As for torque, if the bike uses a hub motor, it's usually measured directly at the motor using a dynometer. Most e-bikes with 120mm wide geared hub motors deliver about 30NM maximum, larger 180mm wide motors (commonly called BPM) about 50NM maximum, they are made for people who live in very hilly areas. For crank driven motors, it's measured at the chainring, so the figure needs to be scaled down by the F/R ratio. The CX has 2.5 internal divider that needs to be applied to the front ring for comparison. All e-bikes that are capable of assistance more than 15mph + 10% must be limited to 15mph. Bikes with common 120mm geared hub motors don't have to have speedometer because their design limits the no load speed to around 18mph but crank driven bikes must have speedometer.
As for the Fireblade, you said it yourself, the torque on motorbikes is usually measured at the flywheel, before the gearbox, similar to crank driven bikes. The difference is in the gearbox design. Bikes have more teeth at the front than at the rear.
