"No, there was official statement that FDR was stopped before event and that CVR is damaged and will take some time to read. There was also "it is possible that CVR will not contain moment of event too" phrase in official statement, not that there WAS no data."
The official statements posted here indicated there was no data after the event. All normal readings, then everything stopped.
I did not imply the recorders were blank, but that they recorded nothing associated with the event, they just stopped at that point.