I would imagine it's not uncommon for other youth teams to have good coaches who teach the fundamentals. There are plenty of good coaches out there and it's hard for me to believe that Maryville has a monopoly on all of them.
To me, our success at Maryville has been based around having 2 really good feeder programs. Having both allows double the amount of kids getting quality playing time which is invaluable. Both programs have their share of good coaches at each level, but the ability to get so many kids on the field in meaningful games really helps their development before they hit the Junior High and play for one program (MJHS).