Some schools do not have externship programs because they have their own restaurants, and cooking for the restaurant is part of the program. FCI is one of those. So it may be that the schools you refer to fall in that category. Even so, I'm not sure that's as good as an externship -- to me it sounds more like the simulations we did at the school I attended.
I agree with Greg about the stated placement rate. But I doubt any school will be able to tell you how long graduates stay in their first position, how long they stay in the business, or what they're doing five years after graduation. Maybe because if prospective students found out, they'd never apply in the first place.

Besides, it's difficult and expensive to gather those data, and in any case they still don't take everything important into account.
Take a good look at the places those 100% of graduates go to. Do they look to you like places where you can both continue to learn -- to broaden your knowledge base -- and have good chances for advancement? Again, as Greg said, they could be worth the gamble.