You may well be right, but the argument for potholes and bumps in the road doesn't stack up for me.
Both rears have worn exactly the same. So assuming the suspension settings were correct when I bought it, I've managed to hit various potholes and kirbs to make them both wear exactly the same way and put the settings out exactly the same on both wheels. If it was one wheel then I'd be the first to agree with you.
I'm sure I'll get told to do one by the dealers but if you don't ask....
I'm more interested to hear if other 370 owners have had similar or not or if it's just normal. I've had 16k out of the tyres which is pretty good to be honest, but if the geometry is out and I can get more life out of the next set then great. I don't want to go messing with it for no reason though.