Yes! Style sheets may block the rendering process in IE. When it comes to media different from the screen, as the print is:
media=print
this, lovely, browser stops the rendering until the sheet is loaded. This is pretty strange when it comes to such media, just because it is not used to render the page in a browser. In fact as Steve Souders says the normal behavior of the browser should be don’t block or even delay the sheets for media that is not the current one.
However for further reading see this post with many thanks to Steve Souders again.
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- Optimizing CSS. Five simple steps!