This has to be one of the most embarrassing threads ever. It's not hard, given results from HS X-C meets or major road race meets, to see a natural bell curve in those races.
35 min for 5 miles is anywhere from 50 to 75% percentile. 30 min is not achievable for the vast majority of HS boys or young men.
I suspect this thread's popularity has to do with the penchant for humblebrag among this crowd. Why don't we turn the tables and ask why can't most of you "fasties" run 50 seconds for the 400? I see 400m runners do it all the time!