As a past member of said company's interview panel I can attest to the fact that you can sum up in the first ten minutes whether an applicant will get the nod or not and even tho the sim sessions were a handful for some, these people went on to gain commands and are some of the best in the company.
Of all the people that 'got the nod' probably less than 10% turned out to be 'problem children', of which some are still with the company today.
The current interview process is far more complicated and involved than it once was, and not all the panel members are necessarily pilots or even flight operations people. That's not to say that they're not good at what they do but certain individuals have been known to display a very high expectation.
My two bobs worth