I had a warranty return on a pair of PI's Attack shorts and the shorts they sent me were the same size, but fit like a tent on me. When I inquired about it they said they were from a different season and they'd send me a pair from yet another season that should fit. They did and they fit except they are long. In the end I ended up liking them, but it shows how crazy PI is with size.
Three shorts from three consecutive season, all with different sizes/fits.
I would not recommend mail ordering PI shorts because you have no idea what you're getting. But other than that I'm happy with my shorts, although the chamois is kinda stiff and if I'm not adjusted right it'll put pressure on my nuts. I don't like that.