Carl Henderson of Flickr fame looked like an A-level engineer back then (especially with his O'reilly book) yet some of the Flickr engineers baffled when they saw the Flickr codebase.
Sometime it's all smoke and marketing hype.
I think i must have been the first person who really drilled into his knowledge, because he was more interested in talking about who he knew, projects he had been associated with etc.
I got a funny feeling about him, and asked that he do a simple code project. A week overdue later, he asks for our FTP credentials to upload it. I say that we don't run ftp anywhere, and that he needs to scp to the box. He said he had no idea that ssh can 'copy files'. urgh. He later worked out that his GUI FTP client supported SSH and got so excited about it that he messaged me to tell me about it.
I have never judged the capabilities of a developer based on reputation since.
Josh Bloch admitted himself that he's kind of not really "up"-ing his knowledge/skill when it comes to tools (git, eclipse, intellij, etc) but he writes damn good code with just Emacs.
He knows his Math & Stats to debunk benchmark and stuff like that and he knows the pitfalls of complexity.
he also fell apart in the code test, which was pretty simple (using a library I had written, which he made a copy of and edited). I have no idea how this guy got his reputation, but it seemed to be more amongst non-tech tech people, if you know what I mean (who are easier to bullshit, I guess)
when I started my career I worked with a bunch of old IBM mainframe guys who had no idea about modern web stuff but were some of the best programmers I have ever met. I could take a problem to them in a language they didn't know (so for eg. VB.NET) and they would talk me through it.
Netscape's code was pretty crappy too.
But hacks will always be hacks regardless the discussion of "getting product out of the door" vs "never delivering".
This isn't some naive Bayes spam filter from 1992. Hunch is really, really accurate.
Grandparent makes it sound like Dixon pulled this off in his spare time. He assembled a team of A-level engineers, then secured millions in funding so they could develop an awesome recommendation engine with almost no clear revenue stream. I challenge anyone to find a CS grad who can match that in his or her spare time.
EDIT: restructured on second read.