That makes no sense...what's a 10 knot over run? That you over run at a speed of 10kts, when you get to the end of your balanced field?
What if you have 5000 feet of buffer? Which has been my premise........oh that's right you never do...because no matter what the runway length is...your derate it right into the over run.....
So yeah, I guess, if you decide to burn up 12000 feet in your balanced field numbers...passing the 6000 ft taxi way at 32 knots...sure I get it...at the very end...if you abort past V1...you will hit the weeds a little faster..
Sure I buy that...