I would like to see more info. from the FDR/NTSB re: the speeds they were at while configuring. If you have the power @ flight idle in the Dash (Q200) and drop the gear @ 135, extend flaps 15 after 3 Green/Amber Door Advisory lights out, you'll get a stick shaker approximately 8-10 seconds after moving the flap handle.

1.) What speed were they at when LDG GEAR Extended?
2.) What was their Torque Setting at the time?