In a RWD car the RR does take a little more abuse in left-hand drive countries. Heavy acceleration on a right corner (stop sign, traffic light, mall exit) makes the RR most likely to spin, even a little. Higher speed left hand turns followed by throttle application puts cornering plus acceleration load on the RR again.
That all being said, there's still a good chance of an alignment or suspension problem if this started suddenly and these things haven't been checked.
I've found a lot of BMWs wear the RR a *little* faster, but noticeably, even when everything about the car is spot on.