Been thinking about the same thing myself lately?
I pretty sure the
www.de.sitename isn't valid, it would be htp p://de.sitename.com
www. is a sub-directory like any other, ie. your de. above.
I've been waiting until I really get into the nuts & bolts of my localized versions to decide?
Still figuring out how to have the content change, along with the site language template. I see some hackin' ahead
I've noticed a few lately that are using the sub method ie. de.sitename.com & they're not doing as well as they should be IMO, so...
Anyone else have any hard evidence, one way or another?