There will be lag, sometimes significant lag, in moving I think. Remember, the protests were about trying to save Reddit, and, failing that, making it as obvious as possible that Reddit's about to shoot itself in the groin. People who have invested a decade or more building and running stable and growing communities kind of have to grieve the loss of the fruit of their labours.
I do think you'll see many of them show up here relatively soon, as users. But the prospect of rebuilding from near scratch will probably take a little more time for people to wrestle with.