Absolutely. I got that snake in 2006 and she is what started my Pewter Pied group. She also produced both of my "urban camo" animals. I'm not certain there isn't anything else going on, that I'm trying to prove, but she is a first gen Cinny Pewter.
Stunning snake you have regardless of genetics; I'd take her over many of the Sterlings I see, even if she didn't have the potential "urban camo" influence...