It is definitely a nervous tic. He said "now is the time" (well, not really, but his favorite phrase) 61 times in the course of out 6 hour meeting. He can go long stretches without saying it then - boom - 3 or 4 in a row.
Definitely made the meeting more interesting.
I had people around me counting as well!!
No surprises.
On This Day in Math - September 6
40 minutes ago