My sophmore year (started running during the fall season 6 months earlier) I ran 9:57 2mile race (not a 3200m) and 4:29 mile. Few months later, I ran 15:57 road 5k in the off season. I had not improved much the next spring season, only to 9:54 2mile and 4:20 mile. I guess, I had trained too hard too early (jumped right to 60 -70 miles/week with much, much faster guys, and the workload was increasing).
Then finally, my senior year, after 2 and half years of running, I had reaped the benefits of mileage and better confidence (the fast upperclassmen guys from our team were off to colleges), and I ran 8:56 2mile and 4:07 mile.
As for the XC, we usually ran 3 mile courses, but we got such wild times very often that nobody believed in the accuracy of the courses.
I was not a sedentary kid before starting running. I played soccer during primary and middle school in a club (I had lived in Europe during my childhood), so we did plenty of running, and I rode my bike everywhere I went, maybe even 30-40 miles several days a week.