Most definitely. I can understand why analyzing radar data in depth might add so much time to the release of this information, but this is ominous. The Telegraph relays the altitude over this updated "last contact" over Pulau Perak (5.68°N, 98.94°E) was 30,000' -- that's definitely not a crashing airliner, as in Payne Stewart's disaster. That's also a course for Banda Aceh (northern Sumatra) or a Great Circle route to Tanzania/Kenya/Somalia, and this particular aircraft is likely to have had the fuel, definitely the range, to keep sailing across the Indian Ocean for half a day -- much of that time under cover of darkness.
Let's see how long it takes our Brain Trust news media to "get a clue" that this latest tidbit of data goes beyond a mere hint of the aircraft turning west. This is a new Last Contact, a long way from the original search area.
This narrows the possibilities (bomb far less likely) to decompression (less likely) or hijacking. 
