This 90% moving DPS is simply myth, a G43 PF unit simply does not have 90% moving DPS.
Ok, whatever the true percentage is (perhaps 90 was hyperbole) it is simply too high. PF's overperform in nearly every capacity once they are upgraded. In team games it is VERY common to see a blob of three PF's with G43 roaming about. Especially if there are not enough Soviet players to punish the blob with rocket artillery.