Did you really read the NTSB Ops Report? The part you reference is from a German investigation of a Phenom accident in icing conditions.
True that. However, I did read all the N100EQ docket documents but did a cut and paste from the wrong PDF. Let's call it clipboard confusion with a touch of proofreading malice.
Here's the paragraph I meant to post from the Aircraft Performance Study PDF:
"The stall characteristics exhibited by N100EQ during the Gaithersburg approach are consistent with an ice-contaminated airplane. The recorded normal load factor shows a stall break at about the same time the aural stall warning sounded, providing no advance warning of the impending stall to the pilot because the wing/stabilizer de-icing switch was not activated. The airplane was 283 ft above the runway threshold. Had the pilot turned on the airplane de-ice system, he likely would have received the aural stall warning about 20 sec sooner and well before the stall break."