Its not that no gas gas has ever had a problem but i just dont believe the frequency is anything like you have referred to dadof. My current 2014 bike is a year old next month and its been perfect thus far. My 2013 i bought used in december 2012, it never had a gearbox problem either. That bike did the SSDT, Alwinton 2 day , Reeth 3 day and the Italian alps 3 day. It was ridden every weekend often sat and sunday from Christmas onwards as prep for ssdt.
Sure im just lucky.....