From the looks of all the oil coating the belly and running /dripping down the fuselage back by the VOR antenna... I would guess it did blow the motor at some point in the flight /descent....
...Just trying to figure out why the word "explodes" was used in the description of this...
That's what I'm wondering, too. From the pictures, it looks like it crashed and got a bit crunched up is all.
I think most of it ended up in one spot, but early reports said the wreckage was scattered over a half a mile. It was probably shedding parts before the main portion of the wreckage hit.
Seems to me like it may have been hypoxia and a date with Vne. But of course that's just speculation and we'll wait for the experts.