I have friends at Skywest so I know it is not a limit for you guys but it is at most other airlines. Delta for one. At Delta and just about everywhere else I know of other than Skywest, it is the limit including gusts for takeoff and landing.

That said, I understand that it is simply the "max demonstrated" but do you feel it is good judgement to operate in an area of unknown performance? I'm sure you'd agree that the safest, and by definition default, course of action would be to always operate within the limits of demonstrated performance.