Unless there's some other advantage to selvedge I'm not aware of, you're never going to cuff the things so who cares?
***The Official Dior Homme Thread*** - Page 7
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Honestly I've only tried on a few pairs but based on those experiences and the measurements I've seen I'd say it can vary. That said I don't really think they're vanity sized +2 very often.
He's saying they were designed to fit like this:
Most people on the forums don't wear them that way. I always cringe a little when I see 'professionally hemmed to a 30" inseam' on Dior jeans on ebay .
Yeah, I realize, but even considering that I think that sizing can vary.
Pretty good interview: http://www.hintmag.com/hinterview/hedislimane/hedislimane1.php
Also, some random (Slimane) runway pics:
? but they're based off the original apc standards and everyone agrees that those are vanity sized