I think this is the key.
At the time, JD was seen as a bubnlegum joke. Remember, this is when ny was still heavy and hip hop was about at least appearing to be a thug or thug respected. JD went as far from that image as possible. He was the universally acceptable, safe negroe.
And he never repped atl hard because he was before atl was recognized as anything. Huge as it is now, in the 80s and 90s, atl was comparable to what we think of perhaps a Tallahassee now. Or fukk it, maybe where I'm at, Jacksonville. You may heard about it, but the name wasn't ringing bells.
So no, he didn't rep atl, because there were only a few cities that mattered back then. Only cities like ny, LA, oakland, houston, miami, had the nerve to broadcast their location. If you were from another city you left it up to the listener to guess where you were from
Or you associated yourself with the nearest city that was poppin. For instance if I was from Jacksonville and made it big, my music would appear like and I may even claim Miami .