He is very trustworty in a way, because when he says something is a done deal, then you know it is a done deal. People like Momblano can use words like this to easy. He is not always the first on news, but you always know that when Di Marzio confirms something, then it is something there. Lets see if Sergej comes.
I mean Momblano gave Pogba a 5/5 possibilty of joining Juve this summer. If Di Marzio said this, then im sure it would happen. When he says something is done or close to done, then its right 99.99% of times.