I haven't used my WN card in a few months, but there have been two times this year when the points posted late. The first statement after RR2 rolled out on, it was almost a week. And there was another month this year where it took over a week. In the days of RR 1.0 the credits posted within 2 days.
I noticed the same thing with Hilton as welel. Hilton credits posted right away with RR 1.0 and there were a couple stays I never changed partners on with RR 2.0 and one of those stays took almost a month to post with WN.