I'm told that Google asks employees to rate their technology skills on a scale of 1-10. Guido van Rossum puts his Python skills at a 7.
I recall Mike Acton basically saying in an interview that if an applicant claimed expert knowledge of C or C++, the gloves came off during the interview--Acton is one of (possibly the?) head tech bros as Insomniac Games, and has done a lot of work dealing with such arcane things as using the Cell SPUs optimally. I would not want to take on that challenge in an interview unwittingly.
I mean its not like he wasn't getting the job.
1 - I've heard of it ... 9 - literally wrote the book ... 10 - invented it
so by that measure guido _should_ have rated himself a 10.