In an article on four-letter's website (insider) Chad Ford comes out with some anonymously sourced assertions about Rubio and the Wolves. 

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There have been all sorts of conspiracy theories about why Rubio ended up jilting the Wolves. There has been talk of immaturity and shady family lawyers who didn't have Rubio's best interest at heart. Maybe that's it. But Rubio had good reasons not to join the Wolves.

He would've had to cough up roughly $4 million to $5 million of his own money to pay the buyout. He would've been immediately thrust into a point guard controversy with fellow rookie Jonny Flynn. And he would've been playing for a team with virtually no shot of winning for the next several years.

By staying in Spain, Rubio got someone else to pay his buyout and gets to be the starting point guard on one of the best teams in Europe. Also, if he waits three years, he can avoid the NBA's rookie salary scale and negotiate a much more lucrative deal with the Wolves (or another team if Minnesota trades his rights) when he comes to the NBA.

Sources close to the situation say that despite the public posturing on both sides, Rubio really wanted to play in the NBA -- just not for the Wolves. His agent, Dan Fegan, had been working behind the scenes since the draft to broker a trade, but Kahn believed he could talk Rubio into playing in Minnesota.

At the center of the storm was Kahn's decision to draft Flynn one spot behind Rubio in the draft. Rubio's circle took the move as a lack of confidence in his abilities and was determined from draft night to either force a trade or stay in Spain. The drawn-out discussions were more of a negotiation tactic until he could either work out a trade with an NBA team or a deal with another team in Spain. When forced to choose between the Wolves and Spain after Kahn worked out a buyout, Rubio chose Spain.

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A number of GMs around the league believe the Wolves will eventually trade Rubio -- especially if either Flynn or Sessions pans out. People close to Rubio support that assertion. Although no one expects Rubio's rights to be traded right away, if Rubio continues to develop in Europe and Flynn or Sessions pans out for the Wolves, a deal is almost inevitable in a year or two.

http://insider.espn.go.com/nba/insider/columns/story?columnist=ford_chad&page=RamonSessions-090904