Dutch, and Chelsea, scout Piet De Visser said in an interview with the Dutch TV Channel Tien TV, that United paid too much for Nani.

He is a talent, but if you look at the European Championship in Portugal and the current tournament in the Netherlands – Nani has not shown any progress.

Therefore I think Manchester United have paid too much money for a player who has talent, but has not developed since last year.

But what De Visser seems to forget is that there’s a huge difference between Chelsea and ManU. Chelsea buys stars and they perform or don’t perform. No matter if they are over paid or not. Look at the best performing players at Chelsea : except for Lamps and Terry, they all have been very expensive players, in the range of 20million and above.
Others are highly under performing. Just to mention some, SWP, Robben, Ballack, Sheva. Chelsea doesn’t grow players. They perform or they don’t.

But here at ManU, we buy talents and then Sir Alex and Queiroz start working them. Turn them in to world class players. We know how to get the best out of players. Examples are numerous.

Becks.
Rio has grown into a world class player.
Rooney, who gets better every season. And always learns to do more, more than just score. He’ll become deadly in the box, but most of all he’s growing in to the role of a player who can cover the whole pitch wisely. Not like in his first 2 years at Old Trafford when he ran over the whole ground and one wondered why he was at that spot now.
Cristiano. Cristiano was a talent. Nothing more. An expensive talent. Fergie made one of the world’s best players out of him.
Ruud was a talent. He became world’s deadliest striker at Old Trafford. Performing well in The Netherlands doesn’t make you a worldwide fear, just look at Kezman’s performance at Chelsea.
Giggs was a talent.
Both Neville brothers were.
No one knew who Vidic was, today he’s among the world’s defensive elite, together with Rio and Neville.

I could go on for hours with more examples. Fact is, we buy young talents and grow them, turn them in to world’s elite. And then one day, they move on. That’s when Roman, Jose and Chelsea come in play : they want to buy the best players. We make them. Young talents at Chelsea fail.
I’m sure Robben would perform a lot better if he were managed by Fergie. ;-)