Without even stopping to see if there is an INDEX or README that gives the files a hierarchy? Without considering whether those files are well-written? Without remembering that plain text files are portable, easy to author in many tools, and easy to view on many devices? You'd rather see a glitzy website with no content?
"If your documentation is generated from source code, I am immediately skeptical."
Even though keeping documentation with the code it documents makes it more likely the two will be in sync? Even though some library authors use their source code documentation tool to write entire files that are nothing but documentation? Maybe you're viewing it wrong: my documentation is not generated from source code. My documentation includes the source code and will generate the library.
Since he seems bent on judging things in 30 seconds I guess it is inevitable that he will elevate form over substance.