Don't think so. Been that way for a long time I hear. But it WAS a secrete:D
If the gunner takes over the turrent then kills are awarded to the gunner in a useless catigory and the tank driver risks his tank without reward. So most people don't do it.
But if the gunner gets in the pintle then he can direct the drivers fire. This is a good training tool and should be kept IMHO.