Did you see it in the local newspaper or just some obscure website with no credibility? Either way, I wouldn't worry about it. Those silly rankings don't do anything. All they do is express a view, which everyone has, they don't solve any crises. If it was just a random list not really explaining how the numbers were derived, it's just a load of crap. There's no reason a ranking shouldn't have at least an explanation, especially if you have to ask yourself how they came about. Philly has something going for it; rankings are just another vicious way people like to trash other cities.