In Holland this is often brought up as factor why Germany is so good. They have a fully integrated country, which is a good organized country too. In the era of speedways, internet, airports etcetera; time and space is a less relevant factor. On top of that, Germans want to win. You can see this if you visit an amateur-game. Their approach is very serious. A nation like Italy is already a somewhat less integrated country with, for example, a clear divide between North and South. The Dutch have a good integrated country too but there is a reason why it is called 'The Netherlands' [plural] and its official name in Dutch sounds like 'Kingdom of the Netherlands' ("Koninkrijk der Nederlanden", in Dutch, which is written in plural form). So, one can make some disclaimers about your statement.