2.2.18 [HTML] Section 12.3.2, Links and external style sheets


The specification states:

 When the LINK element links an external style sheet to a document, the type 
 attribute specifies the style sheet language and the media attribute specifies the 
 intended rendering medium or media. User agents may save time by retrieving from 
 the network only those style sheets that apply to the current device.

All Document Modes (All Versions)

All style sheets are retrieved whether or not they apply to the current device.