Sitting here watching high school football on ESPN in my office, ignited a thought or two about you herd, since confirming your playing time with swett many moons ago(20yrs I'd say). IMHO winning % is a touchy subject. In general, what I've seen is that schools will have an incredible class or two (Freshmen and Sophomore). They'll take their lumps and then when they're Juniors and Seniors, they go 9-1 or 10-0 and make a deep run into the playoffs for one or two seasons, then it's back to 4-6 until the next cycle begins.
In general- parents(Who are typically the biggest complainers) of teams that lose to that now 10-0 or 9-1 team only see that team when they're Seniors and didn't see them get their tail kicked their Freshmen year, so they assume those kids must of been recruited since it's such a strong buzzword with a negative connotation to it...then we end up reading about it on message board posts.
Very few programs consistently finish a regular season .500 or higher every year over a 15 or 20 year span. But, it's really the ebb and flow of high school football. Every team goes through up times and down times; however, I've personally found that more times than not- the teams that are consistently good and that stay good have a stable administration and coaching staff.