Van Persie took his goal tally since joining the club to seven in as many games with a double in the midweek Champions League win at Cluj but then said he needed to contribute more assists.
But Ferguson said: "I think he is a good passer of the ball and has good vision in his passing too. I think the goal he made last week for (Shinji) Kagawa against Tottenham is evidence of his passing ability. I am quite happy with what he is doing now."
He added: "The refreshing thing for me is, he has actually not had any pre-season games, which is quite remarkable, having seven goals from seven games. I am quite pleased about that and I think his fitness will improve even more."
Van Persie scored 37 goals and was named player of the year in his final season at Arsenal before moving to Old Trafford in a £24million deal in the summer. The Dutchman has settled quickly at his new club and Ferguson would be delighted if he could emulate what he did last term.
"I would love that to happen," the Scot said. "In my experience of where we are the moment I think you need two strikers who will get you 20 goals. You get that, then you definitely have a live chance."
United have strong attacking options with Van Persie, fit-again Wayne Rooney, Javier Hernandez - all three of whom started in Cluj - and Danny Welbeck, a substitute in Romania.
England forward Rooney, who returned to action from a badly-gashed leg last week, played deeper than the leading frontman Hernandez in a difficult game in which United need to come from behind.
Ferguson said: "In the last couple of years he has played that position a lot. We tried to avoid the counter-attack as much as we could. Their goal was from a counter-attack.
"We saw that and the difficulties they created and we tried to force them onto us so we could counter-attack. It didn't quite work like that but, with Chicharito occupying the two main central defenders, it gave a bit more space for Rooney and Van Persie."