I suspect a "cargo cult" for hiring is not what rguzman meant. Rather, algorithm skills are one of the best signals you can extract from a short interview. I've always found them to be much better at predicting a candidate's ability to do the job than anything else I could ask in 45 minutes. That may mean I'm a poor interviewer, but until I can figure out better questions to ask, I'm happy to use this signal since in my experience it works well.