If you have the money, do it! I started my PPL in college during ROTC, but quit after 10 hours because the Air Force gave me a pilot slot. I was also in the transition years between the T-3 being grounded and the AF paying for 40 hours. I think it would have helped. I struggled at first, but I also agree with somebody elses post about the AF training evening people out in the end.
One other thought... We had a CFII who puked out before solo. The type of flying is very different than the PPL. So back to my first statement. If you have the money, do it, it won't hurt.