Most probably that 98% is an extremely accurate number, along the metrics of the professor, and I was not commenting on that video (that I didn't watch), I was

Most probably that 98% is an extremely accurate number, along the metrics of the professor, and I was not commenting on that video (that I didn't watch), I was only relating what in my experience happens, in my experience it isn't so horrible and I am still within that experience with more than one language where I scarcely reach 70 or (maybe) 80%.