I'm with criss on that. I fly mostly on Polish domestic routes and it seems that Ryanair is very conservative about wx - very often after landing in poor weather (and no, I never ever bust the minima) we learn from the ground staff that Ryan had just diverted... (they usually aren't happy about this - having to deal with ~180 pissed off pax
) Also, I have never seen them cutting corners - I often hear them opting for full procedure, even if the wx and traffic situation scream for a visual app. They are very quick on the turnarounds though...