I see, there is a big difference between the situations in the States and in Germany! In Germany, public schools are not very "musical". Only a few Gymnasiums spend money to teach musik in connection with an own schoolorchestra.
In Elementaryschools childeren have no musical education or only C-soprano-recorder. If you like to learn an instrument like horn, you can choose between a lot of Musikvereinen (wood-brass-percussion-bands who plays traditional music), or a Posaunenchor (brassbands of the lutheren church) or you visite a privat or county-own musikschool (they only teach music). Most of all hornstudents begins on a Bb-horn! F-Horn is very rare and like a "special darling" for "at home". Doublehorns mostly are used only by students, who learns at a privat hornteacher (orchestra hornists). The reason for that is: Germany is "Bb-horn-land". For example: In our Posaunenchor, I use a Bb-horn, because all other brass is in Bb, too and its sound mix better with trumpets, trombones, tubas and tenorhorns and so on. But in our Hornquartett I use a single F, because we like to have a fine, original hornsound. But with this praxis we are still standing "alone". In Austria a lot of hornquartets play on single F-horns, specialy on the viennahorn.