I think the current numbers speak for themselves. I think at last count there were over 40 failures this past year. Those are the ones invited to leave. There were more pink slips but those were deemed retrainable and given another ride.
In comparison, other majors only had one or two failures.
That being said, the training footprint is very small here, there have been inexperienced pilots as well as experienced not make it. Just depends on the individual.