In my former life, we used to have a speed we expected to achieve by a point on the runway (it was a fighter jet, and we expected to achieve a minimum speed by 2,000ft down the runway..otherwise you'd abort the take-off).
I brought this up in another thread and got the same response. I, too, have a military background and don't understand why airlines don't do this. I'd consider it essential to have at least one such check. More when you expect to have a very long roll.