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I think the better question is: Is any school's OOS tuition worth the cost?
(There are some schools where it is. For instance, if I had the luxury of being able to move, Wisconsin's OOS tuition would be cheaper than my MN IS tuition.)
Personally, I think Wisconsin is in a pretty sweet spot as far as branding and cost. They've got a great reputation and their cost is better under control than many (most?) schools.
But I think it's more the exception than the rule to find any school where the OOS cost is worth paying (not accounting for offsetting factors like grants, gifts, etc.).
The only other way to justify OOS tuition is to be able to get in-state. I remember getting emails saying that around 95% of OOS students get to switch to in-state after a year here. Sure there's paperwork to do, but really they try to help you the best they can. Otherwise I definitely wouldn't have gone to NCSU with their OOS tuition. It's okay for one year, but not all four.
Even if I got into Penn, I'd be saving money by going to Ohio.