[Squid_Tamer]

I'm not so sure about this conclusion. I feel that below-average developers are less likely to answer stack overflow surveys at all. In my anecdotal experience, below-average devs usually have little interest in interacting with the overall "developer community" or reading about development more than the absolute minimum needed to finish their assigned tasks.

[justwalt]

That was my takeaway as well. It’s also somewhat ambiguous; who are you comparing yourself to? All coworkers, everyone in your graduating class, people the same age as you?

I’m sure that we’re seeing at least a bit of everyone thinking they’re more skilled than they are, but it’s more slight than that caption would lead you to believe.