Did the CIA refuse to operate its own secret prisons?

According to the Finacial Times, the answer is yes:

The Bush administration had to empty its secret prisons and transfer terror suspects to the military-run detention centre at Guantánamo this month in part because CIA interrogators had refused to carry out further interrogations and run the secret facilities, according to former CIA officials and people close to the programme.

The former officials said the CIA interrogators’ refusal was a factor in forcing the Bush administration to act earlier than it might have wished.

The Bush Administration is denying the Financial Times' report. But judge for yourself:

John Negroponte, director of national intelligence, who was interviewed by Fox News on Sunday, said in response to a question of whether CIA interrogators had refused to work: “I think the way I would answer you in regard to that question is that there’s been precious little activity of that kind for a number of months now, and certainly since the Supreme Court decision.”

Not exactly vehement, is it?