It depends on the game situation. I'm the U on my crew. If the game is out of reach then I'll hold up spotting the ball until the clock reaches 25 seconds, but if it's close then the losing team deserves the right to have the game played out.
For example - if B is trailing and needs the ball back to have a chance to tie or win and they stop A on third down we owe it to them to try to get the ball spotted so A has to snap the ball on 4th down. I'm not advocating rushing our normal between-down procedures, but we shouldn't be looking to delay the RFP either.
On the other hand, if they game is out of reach I have been known to be extra diligent when cleaning the mud from between the laces before I place the ball.
