I really hope that's not the case. Even as a tech person, I wouldn't want people looking only at my Github page. Call me old-fashioned, but I like the "resume feeling" that LinkedIn provides.
There's something to be said about being able to manage successful open source projects with lots of contributors. That's a huge plus in my book. The majority of programmers, though, are not going to be working on projects like this. A smaller plus is when you contribute to a large, quality project, because it shows you can learn to understand a new codebase and determination to get your patch in.