[tikhonj]

To answer the question: maybe, somewhat? There's a pretty big difference between that and an actual dress code though, which is far worse. Wearing a suit at a tech company might draw a few weird glances or comments, but it won't get you fired outright. Wearing casual clothes at a bank will.

The fact that the culture isn't absolutely, consistently accepting is unfortunate, but it's much better than what came before.

I'm sure a bias exists, but it's subtle. It's the sort of thing that if you expect, you'll see more.

> They smile when the quirky and brilliant hacker wears pajamas and rollerblades to the office, but when they meet the coder in a suit, their polite expressions falter for a second.

Polite expressions faltering? That's the sort of thing you'll find if you're looking for it, whether it's there or not. A person wearing pajamas would have a larger effect in absolute terms; the difference is relative: a tech company would be more accepting of pajamas than you'd expect and less so of suits.