I actually don't see a difference from pre- to after Patch 6. I seems to be very random. I had quite a few 20 in dialogues lately (when I did not need them, of course) and only one 1 since Patch 6, as far as I can remember. Pre-Patch 6 in one important dialogue I had two 1 in a row, that was "funny" (Honour mode, sadly).
