[hosker4u]

It is 28 times smaller? (mini.css 7KB, Bootstrap 199 KB)

[Melk]

I'm trying to come up with a situation where loading a 199kb css file would make a difference. Maybe websites that target an audience that is expected to have a slow connection (banks etc.) but this kind of rules them out by not supporting IE.

[zoria]

Have you used a mobile connection in the subway lately? That's a key use-case, I think.

[julian88888888]

Mobile is especially important for page load.