Why don't we all be honest about programming interviews, and say that we don't care about resumes, references, or GitHub accounts/personal projects/etc (because interviewers on here have often mentioned they don't have the time to actually look at those). It always boils down to the whiteboard and asking algorithms and data structures (and maybe a few other questions) to potential applicants. And for larger companies, it can be a multi day process.
I still do not understand this attitude in the SV tech world. The rest of the engineering world doesn't care much for book knowledge (except for college hires), while SV thinks the ideal employee is a walking CS textbook.
Github used to be a good signal, as in having a Github account alone told you something about the person before word got out, now everyone and his dog has one. Just as now "knowing Python" isn't a signal anymore. http://paulgraham.com/pypar.html