Rubbish. They held negotiations behind closed doors of some form. They didn't come to an agreement. MS announced cross-platform play with the people who'd partner with them which didn't include Sony. The media then asked why of both of them. Sony gave a nonsense PR response. The media should also follow up with an iOS cross-platform query, because this announcement doesn't support tablet users. If MS is going to be billing through XBox Store, no wonder!
It is not even a negotiations, I highly doubt there was even a discussion during more than 30 seconds... From a corporate point of view it is a non sense, give customer data to a concurrent, it is just stupid and I am sure Microsoft know it, the Xbox division is not a Sony partner it is a concurrent...