Forlán is not surprised at his former club's regression since Sir Alex Ferguson's retirement.
The former United striker told the Telegraph: "Players aren't robots they need to adjust. I think Moyes will do well but fans need to be patient. United give their managers time. They should judge in another season. Until Moyes gets it right, it's a bonus for all the other teams. It's their moment now, their window to profit while United change."