I just Beat The GMAT!

Guys, just took the GMAT today and received a 720. I'm not entirely dissatisfied with my score, but my quant percentile is 70%. On the Kaplan CATs I had been regularly scoring 750 with over 90% on both sections, so I was surprised to get a 70%. That being said, if I were to pick a section that I was not as adept at, it would be the quant section. Should I retake the test again? I still have enough time to retake in 31 days given Round 2 deadlines by 6 Jan. A bit of background. I was an investment banking analyst/associate at a bulge bracket firm for 5 years and have been working at distressed credit hedge fund/private equity (hybrid fund) for the last two years. I am only targeting top 5 US schools. Is it strange that I did so poorly on quant that I should re-do the test? (I thought the quant section was pretty comparable to Kaplan, so was quite surprised when I did so poorly). Any advice is appreciated. Is the 80/80 rule applied rigorously?

Make ur essays strong...ur score is really good ...u can get through if ur essays are top notch!!!