Only if Murali boycotts the next tour of Australia. The stats will never even themselves out anyway.
Just watch, he'll get flogged in the Hobart test just like he did in the Gabba test last week but he'll go home to Sri Lanka and rattle the supposed England batting lineup that can't play spin to save their own lives and his average will drop back down 20 thanks to those spinning paradises.
Just to prove the difference in difficulty.
You've already stated that Sri Lanka's pitches are 'made for' Murali, and most opposing batsman struggle in Sri Lanka. We play spin pretty well imo, better than we used to.