JB's get pushed onto an unsuspecting public all the time. It works well for some guys, but is awful for many others. A very controversial PU. Even some of it's biggest fans admit that it sounds "atrocious" in some guitars. The JB was one of the first aftermarket PU's, and in the decades since then, their have been many better high-output bridge models made. To me, it was a rough first attempt, and the Custom series (C5, CC, and Custom) far surpasses it.
If Randy used a DD, I'd like to hear the explanation from the guy who made the decision to put a JB in his signature guitar. Everywhere you look you see JB's, and of course, you see many being pulled & sold on the used market. When are manufacturers going to learn?