Yeah, they reported overspeed warnings to ATC and very high descent rates (first 10k, then 20k feet per minute), and they had an extreme vertical speed on adsbexchange of over 32k feet/min (which would be 370 mph or 600 km/h), and then 506 knots (when descent was about 20k ft/min) declining to 241 knots in the horizontal direction. Go fast enough in a dive and a plane will start to break up, like Flight 93 on 9/11 or that recent FlyDubai incident, where the rudder tore off in a dive. While it was too blurry for me to tell—it was moving very quickly—one comment on the dashcam footage of the impact said that looked like the vertical stabilizer or something had come off, and in (Florida governor) DeSantis's press briefing, he said that there was debris spread all over, which is more likely if the plane starts breaking up before it hits the ground.

EDIT: According to this, a Learjet 60 has a maximum speed of 465 knots.

Unsurprising.

“We are in an overspeed condition descending 20,000 feet per minute,” the pilot radioed.

When an aircraft is overspeed, it’s going faster than designed and that exerts extra force on the parts that stick out (like wings and control surfaces). Too much overspeed and of course parts start to break off. That doesn’t mean those parts had anything to do with the original cause of the descent (which seems like ice and weather).

There’s nothing new to report until the passenger list is disclosed or the crash investigation is concluded, this is just a nothing headline looking for eyeballs.

Edit: Here’s the single frame before impact from the dashcam video that captured the crash. Looks like no wings by that point.

Planes outside of like military fighters aren't designed to descend while the engines are going full ass. 20k meters per minute will probably shear some stuff off.