What Shelton says is heresy! Shelton: I hereby expel you from the Jeet Kune Do Nucleus! Turn in your decoder pin and portable Bruce Lee shrine immediately! 
All BS aside, I'm still sticking to my guns: I'm a right hander who fights in a southpaw stance. I listed my reasons in an earlier post <
http://jkdunlimited.com/forums/index.php?topic=1476.0>.
Ultimately, I think it is a matter of personal preference: some people just fight better in one lead than another. I've spent a lot of time fighting in an orthodox lead and it has never felt quite as good to me. I give all my students a choice of which lead they wish to fight in, and they tend to split about 50/50 between strong-side-forward and strong-side-back. Anyone who preaches one lead as if it were religious dogma needs to lighten up.

Both work just fine.