[notacoward]

Yep, that's pretty much. It has nothing to do with which is better. Nothing whatsoever. It's just that a handful of companies that hire a ton of programmers and pay them a ton of money happen to share the same bias, and even that's probably because of copying each other. Even if you controlled for current company, alumni of those few have probably carried the gospel even further, again no matter if it's right or wrong. It's like observing that people who dress like Wall Street brokers make more money than people who don't, without considering what else it might mean that someone works (or had worked) on Wall Street.