I think not. You seem to imply that there's a deceleration of 3 microseconds per year for a million years? I read it that way. Sorry.
You're right. I misread the article as 3 microseconds/year when it actually said 3 microseconds/DAY!
So I was off by a factor of 365! Good observation.
So instead of 3 seconds per million years it is actually 3 seconds per million yrs/365. Right?