Can you point me to where on their blog they mention they're using native font rendering?

http://stackoverflow.com/a/12976496 shows me that they aren't using native font rendering.

Hmm, I don't use Linux myself so I can't really be 100% sure. But I found the info here. Maybe they don't mean "platform rendering engine" when they say "system fonts"?

http://blog.jetbrains.com/webide/2012/10/phpstorm-webstorm-5...