[majormajor]

"It seemed like they interview people all the time."

I bet you hit the nail on the head.

At my current job, I've had weeks where I've been on an interview loop every day. At that point, I'm not going to spend much time looking at your github code in depth beforehand each day. Especially when it's a candidate whose area of expertise isn't the same as mine, so I wouldn't know what to look for. Ideally we'd be better able to match interviewers with interviewees, but if we had enough people to be doing that, we wouldn't be in the mad hiring rush that ends up with a developer doing five interviews in a single week around career-fair season. ;)

(My last job was a much smaller company where each hire was weighed a lot more, and we absolutely would've looked at all that stuff there.)

However, I always start off asking about a specific project from the candidate's resume, usually the one that I think sounds most interesting to me. Depending on how long they take to explain it, or how interested they seem to be in explaining it, I'll follow up with a more open-ended question of what their most interesting or challenging project was -- if you can sell me on that project, it's just as big an influence on me me as the coding or design question that I'd also ask.

But I have coworkers who don't ask about other projects like that, which I think kinda sucks.