The Mad Hatter Principal
States that, as the Early Universe was...er early, it didn't have to rush about much so it just pootled along at 67 kilometers per second per megaparsec.
However, the Late Universe being somewhat perturbed at being late has had to up it's velocity to get to where it's going and to arrive on time, hence the increase to 73 kilometers per second per megaparsec.
The burning question that faces us now is where exactly is it going and why must it be on time?
And of course has it got a towel?