In my experience this is not the case. It's just another part of the JetBlue mystique. The times I've checked them out I found that the frequency of flights was lacking (ie one or two flights/day). Also, the arrival/departure times were rather inconvenient.

Getting back on topic, CO knows they have an F problem. I don't think that three years ago anyone would have predicted the dropping of F fares and the selling of a lot more F seats.