Unless your making a lot of power, you do not want to be in OD if you are trying to race someone. If the chance that your car did not down shift when you jumped on it, I would say that a bus might beat you. OD is for economy, not speed.
Now in my car, I make a lot of tq(450 rwtq), so OD in my car screams. I can hit 150 MPH in about 19-20(at the most) seconds going thru the gears and OD.
When my car was running 13's I absolutely hated it when it would not down shift during a race at higher speeds. Like if I was going 100 MPH and jumped on it and it did go into 3rd, but stayed in OD, pissed me off.
I don't think that my fiance's 99 V6 5 speed could beat my 89 GMC truck if she were in 5th and I was allowed to be in 2nd from a 60 MPH roll.