I believe so..I recall they moved their manufacturing from CA to either Mexico or China, can't recall which at the moment. Are you looking at a particular pair?
Welcome to the community Mike! Sounds like you have quite the denim collection. I'm in the DC area too! Have you ever checked out Denim Bar? I think there's one in Pentagon City, I've never had the chance to stop and check it out though.
I'm a fan! Personally, I like it a bit more when there are many patches that overlap so it doesn't look too much like an old patched pair of jeans but more intentional.
Lorna posted Diesel Black Gold's Fall 2013 collection. The theme behind the collection was "the need for speed, the open road and the ambiance of a classic gas station." You can check out more images from the show in Lorna's post here.