The guy at the LR place said the PTU's they have changed are mostly on 2011/2012 models...
My 2009MY had a replacement PTU before I bought it, and a replacement diff too, although whoever fitted the rear diff didn't put any oil it it, so it seized solid while I was driving.
I can feel the Haldex engage whenever I turn a tight corner when accelerating, so it's no wonder the PTU or diffs fail on the FL2, as it must put enormous strain on a AWD system, with it engaging when not needed.