It's interesting, now that I think about it, really no school comes close to Valley's potential talent pool. DM East and DM Lincoln are large, but they have an overall lower SES and as the DMPS has been arguing, many of the kids have to work and/or can't commit to sports/attend all the practices (not to mention special training camps, weight training, etc.) Additionally, although there are some great coaches in many different types of schools, wealthier schools and/or schools with greater reputations might create incentives for better/more experienced coaches to leave for pay better salaries or winning programs. Does anyone know which school might come close to Valley? We can look at the population of a school, but then we must realize also SES, community support, school tradition(s), etc. are relevant factors as well. If Ankeny only had one high school it would be close (as it is also growing very quickly), but we all know they have two schools now. Waukee is also moving to two schools. I mean, I am guessing there shouldn't be a legal ban against the size of a school (some high schools in Illinois are 4,000 or 5,000, and some in NY 7,0000), but it seems Valley is in a league of its own in the state of Iowa given all the factors, whereas it is interesting most other districts start thinking about another high school when a class gets to be beyond 400-500 kids per grade. People talk about parochial school's recruiting and having an advantage, which may have some relevance (even though as many say, they must recruit ALL their students, and the vast majority at the likes of Dowling and Xavier are from the k-8 parochial programs and/or at least participated in the Catholic football league(s) at younger ages-again, it is more about SES, community support of programs, etc.). Some have mentioned a potential 5A class, and it seems that is probably necessary in the state of Iowa, but it seems odd nobody really points out this massive advantage Valley has or at least I haven't really heard about it.
As others have said, I like the RPI system because it does seem that there has been a demographic shift of population and talent to the DM metro since 2000, and it is probably here to stay unless new demographic trends emerge. I mean, if we look at census data, Des Moines has added almost 200-300,000 people in the past 10-12 years, which is the size of the entire Cedar Rapids metro area, and is now surpassing 700,000 and will keep growing rapidly (compared to other metros) if trends continue. I think many metro teams (like SEP, Waukee, Johnston who might lose to Dowling or Valley by a touchdown in the regular season or playoffs) feel stifled by Dowling/Valley/Ankeny only to see them beat east side teams by quite a bit in the past 10-15 years, and given the breakup of IC schools, and apparently Cedar Falls soon as one commentator mentioned, as well as the Bett/PV split, those are rough trends for the east side of the state on a demographic scale alone.