I think I speed up a little bit maybe 10-50 posts before a major milestone. Then I pause on the final one, because I don't want to waste it on a boring everyday
thread. I usually wait until I have something clever to say in MD or MO. Which can be pretty rare, as many of you can attest.
I think once I even delayed posting my milestone post by half a day or so just to annoy Map, because I was pretty sure she was waiting for my post so she could post congratulations.