Cpt. Relax,
my arguments are reading these posts here about OFT and myself having attended the OTHER legendary Groundschool in Florida......
I am not saying that all Groundschools in Europe are good, there are most likely some really crappy ones over here too, but when you are in your own country or at least an EU state, getting completely screwed is less likely. Also, you have more options to get out compared to the US where you have to leave your balls in a basket before they let you pass through customs.........
Your "JAA UK approved flightschool" is fully aware of this...