What Now? wants to know if "you tell the class that they collectively earned 5 As, 12 Bs, 1 D, etc[.]" To which my scintillating answer is: sometimes. I'm more likely to spend time discussing what was done well and what needed improvement; this seems more helpful than a list of grades, which focuses the students' attention on the least important element of the instructor's feedback. I've occasionally posted the overall list of grades for final exams and the course itself, usually with some general notes about any trends I noted in the exams/papers/whatnot.