Perhaps better to say that if you lock the wheels together too much then you will have trouble making the car turn as the wheels are being forced to turn at the same speed. the practical upshot of which can be chronic understeer as the front wheels cannot overcome the straight push generated by the rears.
Certainly Tony's diff seems to have a reasonable ballance from what I have seen whilst following. It still goes aroud corners
very quickly indeed. Unfortunately I wasn't looking behind me when he was entertaining the locals whilst trying to keep up with me, but the reports are that it will go sideways in a nice correctable manner.
