VBAC - Second Time

To the VBAC mommas, has anyone had 2 vbac's?  I had a successful vbac with my son and am now due with my third child in September. The amount of time I spent pushing with my vbac was close to the same amount of time as with my first child which resulted in an unplanned csection. I am wondering if this go around (if successful) the time spent pushing will be shorter since I was able to deliver vaginally last time.