Honestly, could be anything. Could have been like that Air Surwya (sp?) CRJ where it was a severe over rotation rate. That could do it too if it had any hint of contamination. Or maybe a gust that hit at the wrong time and pushed a winglet into the pavement.
Not sure. Sad all around.
The real scary part is this isn’t like some Air Florida case where they were sitting out there for hours. These guys literally got type I and IV, and tried to takeoff fairly “immediately.” I mean, from the pad to runway, checklists, etc, that’s gonna add a little bit of time. But no unreasonable / undue delay. It was just type IV and go.
…which is why gut feeling still says there might be more to this story. Will be interesting to see the final report.