I'm not feeling this dress over jeans. I agree with Zeitgeist on the wool thing - I have found it totally depends on the type of wool. Merino is the most comfortable wool for me, but in general I stay away from wool. And mohair - sadly, drives me crazy. I've seen some beautiful sweaters this season, but even if the mohair content is minimal, they bother my skin, so I have learned to keep mohair out of my wardrobe.
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"Good taste shouldn't have to cost anything extra." - Mickey Drexler
I agree that it's too long to wear over jeans. That look is tough to pull off anyway, and I'm thinking this isn't the right dress for that look. I also kinda doubt that Urban's wool or mohair is of great quality, so it might be itchy.