> with him frustrated that I couldn't remember the details of an algorithm I last had seen 6 years earlier and couldn't recite in 60 minutes what took our professor 180 minutes of lectures to cover, and me frustrated that would have taken me 30 seconds to look up.

Sounds like a very effective way to filter out people who haven't taken algorithms courses recently and/or don't spend hours every week on algorithm puzzle contests or solving algorithm puzzles for "fun." They could probably save a lot of time by asking your graduation year and looking at your hackerrank score.