Over on the LA Board, we've been having a debate over the authenticity of Cheez Whiz on Philly cheese steaks. A poster who hails from just outside the City of Brotherly Love insists that no true Philadelphia cheese steak place would serve Whiz. I've only been to Pat's, Geno's, and Tony Lukes, all of which I remember serving Whiz. I'm told, however, that these are tourists traps and not the real thing.
So tell me, hounds, is Whiz really the exception, rather than the norm we've been led to believe? If so, is it the kind of thing that's offered simply out of tradition? For tourists? I personally love the combination of American plus whiz, but am genuinely curious to know what Philadelphians (and Pennsylvanians generally) consider authentic. Please be as specific as you can, since I'd love to learn more about which places serve what style of cheese steak for the next time I'm in your fair city. Thanks!