Hermione (I'm sure that's her) rates her C++ knowledge at 4-5, and Stroustrup himself at 7!?
Bullshit. Either they are poorly calibrated, or they are displaying false modesty. Sure, they probably still have plenty to learn about C++, but come on, Hermione is already at the top 97% in terms of language lawyering.
Wanting to be stronger is good. Not realizing you're already quite strong is not so good.