Sure it is. If a company's hiring process for a single candidate takes multiple months, that's bad. The candidate experience is critically important. We have five stages of our interview process, two of them involve speaking with multiple engineers. The whole process takes less than a month, as long as the candidate has time. In general, it's 2-2.5 weeks and that involves coordinating calls with engineers in the Americas, Europe and APAC.

If it takes longer, it's always an issue with coordinating with the candidate schedule. (this is my experience with my hiring process)

No it sure isn't because I never said months or multiple months.

Fine. I'm mixing replies. A single month is still unreasonable. That's a bad candidate experience. That changes nothing about the number of people who interview you though, just how quickly.

Well due to real world constraints of scheduling even with people who's sole job is to interview candidates the speed at which you interview is most likely going to be a function of how many people need to interview you.