I do not believe all disconnects are personal leaves. I seen wgt exception errors are just as bad. If someone has cheap crappy internet, then it is going to effect all 4 players in alternate shot. Assuming it is a person just disconnecting is putting you just as low as the one if that one person disconnected on purpose. I believe more than half of the problems on this site is the site. They could care less if this site is running really well. Every single game I play on skins, alternate or blitz, one person disconnects the other two besides me disconnects is wgt. If one disconnects and just one of the other three disconnects it is someone quitting. I rarely disconnect unless it is wgt exception error, which is happening quite often now. No matter how many posts or threads you see in this forum under the wgt bugs section probably less than half are fixed.
I think forfeits are worse than someone disconnecting. At least a disconnection you know is either wgt or a player quitting, but a forfeit is just plain childish.