Don´t worry, guys...
Pato isn´t a normal 18yo...the kid is used to pressure and for to be the man in a BIG club in Brazil.
Sure, Milan is even more BIG, but the ones asked to be the man in our club are Kaká, Pirlo, Ronaldo, Nesta , Rinno and P.M...
BTW, nice article in Gazzetta Dello Sport(in Italian) about Pato, very nice read
http://www.gazzetta.it/Calcio/SerieA.../10/pato.shtml