To be honest, I don't think we can set a timeframe on it just yet. We have no idea if pokemon like Nasty Plot Mismagius will effect their respective tiers, and if so, by how much. Waiting a while for things to settle down and people to collect information is a good idea - two weeks to a month to get a decent first idea on whether a lot or a little will need revamping (seeing as OU / UU revamps are currently taking place).
As for singular movesets, I personally recommend sticking to this plan and waiting a while (around two weeks, again) before the first versions of specific new movesets start to get posted. I have been meaning to catch up with darkie to ask for his opinion but he seems to have disappeared off IRC, but I doubt he minds too much.
In short, just a couple or a few weeks "pause" on most things. I'll post some threads around C&C later unless anybody has any objections.