GMAT Score + Chances of Admission

I took the test after about 2 months prep and a Kaplan class and got a 680. I was satisfied but still a little disappointed with where I hoped to end up (700+). Particularly, I did not answer the last question in quant which I feel really lowered by score for this crucial range that I am in for a top 5 school.

My breakdown was:

Quant - Scaled score of 44, Percentile 73
Verbal - Scaled score of 39, Percentile 88
Overall - 680, 89th Percentile

My choices of school in order are Stanford, Wharton, Harvard, Columbia, Cal - Berkely.

1. Does this score allow me to be on equal footing with those applying to top 5 schools?

In regards to other AdCom areas of interest (essays, GPA/Undergrad, work exp, and recs):

I went to University of Texas - Austin for their Business Honors Program. Final GPA of 3.74 with major GPA of 3.90 (Finance). Did real estate investment banking for 1 year for large bank and was tapped to jumpstart an opportunistic investment arm focused on real estate for a local group for past year as Director of Acquisitions.

I am most worried that 2 yrs work experience is not enough (though it will be 3 by the time of arrival) for these schools with 5 years average.

Other qualities: valedictorian (1 of 452 in HS), should have solid recs from current bosses, not overly involved outside of work with resume-building stats. Play lots of sports, involved in church, not big roles though.

I'd really appreciate everyone's ideas for my chances. Thanks.