After 8 years at the regional's (currently at DAL) I can tell you there is a big difference between when a regional guy asks for something from op's and a mainline guy does.

2-3 calls and no action is pretty common...then what do you know...it's departure time and they don't have time to do it. F that...I wouldn't push till they did it either.

I'm not saying you might not be on to something, but give these guys a break. They are some of the most professional pilots out there.