Remember that 8 seconds to THS neutral has the elevators commanded to full ND throughout.
I would assume here that, even with full forward SS, the airspeed did not go from a fully stalled 150ish to a value in excess of 300 knots in 8 seconds.....
I would infer then that if the THS went from full ANU to neutral in 8 seconds,
a trim condition for an airspeed in excess of 300 KIAS clean, while the airspeed was still some margin below that value, that the aircraft was at this point, '
not in trim'.
