There are statements being made publicly even ahead of data readout from the FDR at:
Indonesia retrieves crashed AirAsia jet's flight data recorder - Channel NewsAsia
S B Supriyadi, a director with the national search and rescue agency, said initial analysis of the wreckage so far recovered indicated that the plane broke apart on impact with the water.
"It exploded because of the pressure," he told reporters in the town of Pangkalan Bun on Borneo island, the search headquarters. "The cabin was pressurised and before the pressure of the cabin could be adjusted, it went down - boom. That explosion was heard in the area."