I think your attitude is overly dismissive. At least, I'd have a hard time writing someone off as a "typical designer" (a bit of a tired stereotype) if they're experienced in both vim and emacs, let alone work for Peepcode. The author offered a sustained, reasoned argument for better navigation within projects.

I agree that as a programmer, I care about functionality and tools that get out of my way so that I can get my work done quickly and efficiently. But I don't think that means that everything has to look ugly (or better - that it couldn't be more elegantly presented).

I'm a Vim user, and rarely leave full-screen mode. It's a great app, but on large projects even with the Fuzzy File Finder plugin, I agree that navigating can be cumbersome. I'd like to try out Jamis Buck's "Fuzzy Finder Textmate" plugin that builds on this, but have had trouble getting it installed on both my desktop and laptop.

tl/dr: The author knows what s/he's talking about, and things can be pretty and functional, too.