Earlier quoted context omitted.
Do you have any open source projects? The first thing i'm looking for as a developer when I visit your websites is a link to any code you have written. Which as far as I can tell doesnt exist? A programmer without a portfolio of source code is like a painter without a portfolio paintings. I assume Google scouts are usually looking to hook the exceptionally rare "Monet" and "Picaso" software engineers swimming around…
As a Google Engineer, I can assure you that nobody who interviews you will give a damn about your code in github. Unless you're James Gosling or someone at that level. (But then again I don't think they interviewed James Gosling in the same way they interviewed me, so the point is moot.) Google interviewers are interested in how well you can code (or design a solution) in a whiteboard for 45 minutes. I'm not claiming…
It works as long as majority of the CS population dreams of a Google job. There are so many candidates that having a high false negative rate really doesn't matter. However, as Google slowly becomes less popular, it's current interviewing procedure might not work anymore.
I think that having high-quality open source project is a reasonable indicator of a person's technical abilities. For companies with a smaller stream of candidates, it would be silly to ignore such sources of information.
By the way, I am always surprised how obsessed people are trying to get into Google. After some persistent bugging, I went through a phone interview. I was invited for a follow-up interview, but decided that they could not offer the kind of position I was interested in. (No, I don't want to work 18 months in site reliability engineering when my interest lies with natural language processing.)