There's no way the bolded is true. The player runs the show. If he wants to sign somewhere, the agent does the deal, even if it's Scott F'n Boras. He can be pissed at Boras for misreading the market, but if Martinez wants this over with, it's on him to pull that trigger.
Case in point, and I feel like I've brought this up before, is Jason Varitek. Tek was represented by Boras his entire career. After the 2008 season, he turned down the Red Sox arbitration offer (the pre-cursor to qualifying offers) to enter free agency. Big miscalculation as there was no market for him. Varitek took the initiative, called John Henry to get the ball rolling, and told Boras to do a deal with the Red Sox whatever it took. It ultimately cost Tek $6-7M turning down the arbitration offer, but rather than sit out and wait for the phone to ring, he signed where he wanted for less than his agent told him was the going rate.
If Martinez is allowing himself to be led by the nose by Boras to hold out against his own desires to just sign and get to camp (whichever camp that is), then he's dumb as a rock. I don't believe that's the case.