Machinbird,
It's a personal conclusion, but I think it's logical.
I've munged some of the FDR traces into a graphic here (apologies for the poor resolution, but I only had the PDF to work with) :
As the stall warning clicks off at around 2:11:47, the THS moves towards its limit of travel and the ground speed falls below 200kts. The THS took approx. 1 minute to move to the limit of nose-up travel from neutral. At this point the PF has been holding full back stick for approx. 5 seconds and will continue to do so for a further 25 seconds or so. To get the nose down and return the THS to neutral is going to take some time, and they're falling at speeds of up to 10,000ft/min.