I don't doubt that it's quite stressful for some people. In general, I think any element of an interview process is going to be stressful for at least some peop

I don't doubt that it's quite stressful for some people. In general, I think any element of an interview process is going to be stressful for at least some people, just given the stakes involved. That said, at least this guarantees it's not stressful and a big time sink. Also, I do think that some people are able to complete it in a third the time, but I think the more useful evidence is that many candidates complete it and do a perfectly good job, some even with a healthy chunk of time to spare. If it were a totally unrealistic time goal I'd expect we'd quickly notice when no one finished.