AntimoonAnyone who's ever surfed any explosive should know the difference between the effects of being crouched and standing. There's functionally no difference between being in the air from jumping, and being in the air from a rocket jump, so you can test this by jumping on the ground while being shot by a shotgun. Turn on cl_showpos and there will be a clear difference in peak velocity, and in distance travelled due to knockback.
nutman