BBC:
"The Malaysian prime minister said Inmarsat had been able to shed further light on the plane's flight path by performing further calculations on the MH370 data "using a type of analysis never before used in an investigation of this sort". According to Inmarsat, this involved a totally new way of modelling, which was why it took time. The company told the BBC the new calculation involved crunching far more data, which included what other aircraft were doing at the time.
Inmarsat gave the AAIB the new data on Sunday, it said, which had to be checked before it could be made public. Officials said earlier that the plane automatically sent an hourly "ping" - a brief signal - to the Inmarsat satellite even after other communication systems on the plane shut down.
Initial analysis showed the location of the final "ping" was probably along one of two vast arcs running north and south."
I don't understand why people are sceptical about the data analysis time? Any scientific analysis involves reams of data and processing and people time - and if the searches had been given up whilst there was still any chance the plan had made it back to land, that would have been wrong.