I played 20-30 games in a row since this Pctge crap started - I haven't moved at all from 97%, and I have had two disconnects of my own (in the past, with pre-apologies for one emergency and a power outage on the other). All other disconnects were my partners.
Like politicians often do, these figures are being mis-manipulated, either by choice or bad algorithms.
If they began on 1 Sep 2012, at least everyone who has had problems in the past could start fresh. (I get scared when choosing partners was have pctges way less than most others.)