Moped Army

I guess what I am getting at with the whole synthetic debate is not whether synthetic is superior to conventional, but the fact people will actually argue for one brand of synthetic over another. Every motorcycle shop I've been to gives me the same response when I ask which one they prefer "...its all pretty much the same, they are all good." But, it seems like an epic battle of life and death among moped enthusiasts, with anecdotal evidence like "I used Amsoil once and my pipe got completely clogged with sludge!" or, "My buddy switched to Motul and he gained an extra 1.5mph!"