Basically all I'm saying is that I follow the checklist. To that point, I have never seen (or remember to be honest) a checklist that did not have 'release brakes after chocks installed' on said checklist. And that has been a lot of different checklists for a lot, a whole lot, of different aircraft.
As for carbon-brakes, the few aircraft that I flew that those were installed had the same thing on the checklist, however, the only Boeing I flew was the 727.