It probably varies. Natural language is a mess, and in the hands of geeks...ugh. So if I have an interesting function to understand I would just as soon see the code. But if I am looking at standard library stuff it will be hard to muck up the one very short sentence description. Add to that that we have a new language with a lot of shortcut syntax and that its a Lisp and a lot of non-Lispers are hopefully looking at the language, I think maybe the ball was dropped when we were told to just read the code, as much as I grok that sentiment. It is something I am much faster to say when we have people asking about application code in a language everyone asking is supposed to know.
