This truly is the crappiest list I've seen, and I have seen crappy lists. Creating a 'cool' site like Quora somehow gets you on that list, so does answering StackOverflow questions. I guess you either have to create websites or have Google on your resume to be on that list.
How about creating 2 of the most successful and important operating systems the world has ever seen ? Namely, VMS and Windows NT.
Oh yeah, David Cutler for example isn't on that list, I guess he should have stuck to creating websites in PHP...
Leslie Lamport anyone ? Oh no, he didn't work on some crappy website either, doesn't count !