MakeAPlay
DA
1. Winning High School team would lose to a top-level U15 team: Your assumption is that the high school coach must not be developing players because they would lose to a superb club team. That is not a fair comparison, any more than it would be to claim that the same superb U15 team must not be developing because it cannot beat a mid-table team from the Pac-12. Almost every high school team in America would lose to a superb U15 club team. My guess is that the high school coach is developing his players fine when judged against other high schools.
2. For your daughter to play on a team at that level means that she played on a team that would beat 90% of all teams at her age group. That is a well-developed team, and your daughter must be a well-developed player. The fact that her team does not win most of their games in Flight 1, or Premier League, or the Champions League, or whatever that level is named, does not equate with a "losing" team. In your daughter's case, she plays on a team that would win most all of its games against club teams by an overwhelming margin, which to me correlates with development.
She played on the same team for most of her club career so at some point there was development. She was a diamond in the rough when she got there in 5th or 6th grade and her coaches that she had there ALL had something to do with developing her. Let me be clear that they were a solid team. However, they weren't about wins and losses. I have had many conversations with her coaches over the years and I still speak to one of them routinely and it was always about taking the long view. Never sacrificing today for tomorrow. Not to mention they had the foresight to put her in the optimum position for her skill set and she now plays that position in college and internationally. If the coach had only been about winning I am 100% certain that she would be playing a different position.