We are totally transparent about the process, but this is the standard process anywhere. i.e. if I interview at Google (7 hours) and am not a fit within 90 days, I sure hope we both figure that out (and not in 9-12 months). So given the same # of people who would be let go within 90 days, why waste time interviewing them for longer?
So even though this is implicit elsewhere, we make it explicit (if you don't think we're a fit for you, or we don't think you're a fit for us, we'll part ways)
Let me know if that makes sense