Currently using 2016 PDM professional SP1 and our data card performance with folders is very slow but only with Folders not files. It's not a hardware issue I assure you.
It started slowing down with 2015 EPDM but it wasn't as bad as it is now. When I select folders in PDM, if I switch the "Data Card" Tab to a different tab I can select folders fast, but as soon as I switch back to Data Card it's about a 3 second delay. Also when I create a new folder and I have to fill out the Data Card for it, it is painfully slow
But like I said, file data cards works work fast, no problems at all