[thelist] CSS - @import syntax

[Simon Coggins]

I've been following a thread on www.metafilter.com regarding a site which
offers standard templates for two and three column layouts using CSS
rather than tables.

It's a useful site, and well worth a look:
 
http://www.bluerobot.com/web/layouts/

The thread lead to some discussion about the @import syntax. On Blue Robot
(and A List Apart) they use the double quotes syntax rather than brackets:

@import "style.css";

rather than:

@import url(style.css);

Does anyone know if/why double quotes are preferable to brackets, and to
what extent support for the two syntaxes differ?

Thanks,

Simon Coggins