When he said the average programmer is too stupid to program in a brilliant language, I don't think he was referring to C++. I think he was referring to non-mainstream languages that require totally different ways of thinking (there are many, and I don't know which ones he had in mind, so I won't list any examples). So he designed Go to be very familiar to average programmers, instead of embracing more powerful ideas (which average programmers would have a hard time with).

That was my understanding at least. If you have evidence that he was referring to C++, I'd love to see it! I'm open to being wrong, and it would totally change how I interpreted the situation if he was indeed referring to C++ as a brilliant language.

For those not familiar, here is the quote by Pike that is being referred to, where he infamously implied most programmers are too stupid to use a good language:

"The key point here is our programmers are Googlers, they’re not researchers. They’re typically, fairly young, fresh out of school, probably learned Java, maybe learned C or C++, probably learned Python. They’re not capable of understanding a brilliant language but we want to use them to build good software. So, the language that we give them has to be easy for them to understand and easy to adopt."