It depends what gate your are connecting to--in a thread in the AA forum I noted it took 10 minutes to get beyond B6, pax in line for flts departing (all at the same time) from low B's were blocking arriving B pax from getting to their gates (in other concourses). Also they schedule simultaneous departures from high Bs, the boarding lines criss-cross each other...not flyer friendly. D on the other hand is spacious.^
This. There are some long walks at Charlotte depending on your gate. Connecting from the end of E to the end of B a few weeks ago with my mother it took over 30 minutes, because she had to keep stopping for a break.