Sounds like a dumb idea to me. As for Rainboe's idea of us slowing down, learning a little patience so he can do his takeoff data, that is a little selfish... I would have thought you could mount the same argument the other way: why are you so impatient to get off the gate (and possibly hold everybody else up) when you could be a little patient yourself and get organised
before pushback?
Brakes off on stand to trigger the ACARS "off" signal