Readers probably know Di Marzio best for the transfer rumors he passes along regularly, usually involving Serie A clubs or players who currently play in Serie A. Occasionally he's the first guy to get a story, but more often than that, the stuff he reports doesn't come to fruition. Such is the life of a guy running with transfer info early in negotiations.
However, even these types of journos generally don't use the word 'done' unless they're pretty sure that a deal is done. We're still calling this a rumor, but don't be too shocked if some sort of announcement comes from one of the teams this week. This deal has been reported for a long time.