Sure it did, right about the time the entire thing was engulfed in a fireball from the fuel explosion and it was 19 seconds away from hitting the Atlantic ocean. However, there's no appreciable deceleration immediately after the initiating event, nor for 18 seconds later, roughly 19 seconds before it hit the water.
The fact (there's that word again JF) that the data points taper off in an eastern and northerly direction indicate forward motion is slowing.
Again, that is well after any zoom climb might have occured if it was indeed even possible for it happen.
Do you really think the NTSB would be so stupid as to publish radar data that didn't support their own conclusions?
Yep. Makes you wonder why Ray Lahr has to sue them for the data he's looking for. Why aren't they making it public I wonder? Would it impeach their claims even more than the radar data?