maybe as a not preferred candidate

(being german) it is allowed to ask a Questions?
I just noticed that the selection starts at 7am, any infos of the average duration of days 1 to 3?
If I am not preferred maybe infos for day 1 and 2 are enough
Honestly I don' think anybody except the locals is preferrred here maybe it is just your knowledge in the English language that give Guys from UK, CAN, RSA a little advantage.
But thats a little fear for me getting into a group with only native english speakers. Any expierence on this especially during the group exercise?
Thx