I already dropped one linkshell because of PL. And I'm considering dropping another because there's constant PL requests/offers at least once an hour. I can't give a certain number, but ballpark figure, about 55-70% of parties I partake in start talking about bringing in a PL within given time. Maybe I'm just unlucky?
The thing is, I don't understand it. It is beyond my comprehension why anyone would even want to overuse PLing. To me, it nullifies the entire point of a MMO. Endgame, in any MMO I have ever played, wasn't all that important to me. What was always the best part is the progression to achieve the ability to partake in endgame.
I don't understand the hype about getting to endgame as quickly as possible. To give an analogy, the concept of that style of gameplay (In my opinion) is like trying to ride a carriage with square wheels. Bumpy and not very enjoyable.