I fly into MSN quite often, and UX service there is variable, at best. Most of the problems are beyond their control (weather), but when they have equipment issues, there tends to be a ripple effect that lasts throughout the day (one overcrowded plane overflowing onto the next which overflows onto the next...). And it's so much fun looking at the monitor and seeing a list of "cancelled" and "delayed" flights.

Of course, when you're feeding (and being fed by) O'Hare, that doesn't help either! ATC issues probably affect smaller regional carriers more than long-range planes that have already been in the air for many hours.

And then there are the planes, but even that may not be fair. Sometimes I wonder if people will be happy with anything the regionals fly, or if they're still being punished for all those BA146s and SAAB Boxcars that used to be the norm. Obviously the BA146s are still with us, at least enough to ensure full employment for the mechanics. A little jet with 4 engines? Did some government subsidize production of those silly planes? But the point is that it's something of a crapshoot as to what you might find yourself on when flying UX.