Polls like this make me little ranty : )
Indeed first nations are french (no options here) and english (iconic, also generaly most apealing for, so to say, anglo-saxon world).
Number of german players next after US/UK in typical game community, so Prussia was next just statisticly.
Its just more about number of players : ) Like almost every "historical" WW2 game developed in N.Am for N.Am audience (main $$$) is endless-super-heroic Normandy.
But next round will be more even and interesting : )