Torque is always HP / RPM x 5252, it's law of physics that applies to any angular "force". In metric terms, torque (n-m) = power (watts) / rad/sec.
While meaningful to portray the shape of power curve on IC engines, torque becomes useless on electric motors. Motors by nature are nearly constant hp, with an inverse torque curve, i.e. immense torque rise.
Close to 0 rpm, a theoretical motor would have infinity torque. In real life, you're limited by current capacity of the motor windings.
The EV torque rating at the wheels is only meaningful to measure tractive effort, not motor performance. 11,500 lb-ft, with say 35" tires, roughly translates to 7886 lbs of tractive effort (assuming the truck weighs enough). How long it maintains that depends on the duty cycle of the motors at max torque (winding current).
However, 1000 hp, if true, is nothing to sneeze at...
