Supplement Pages for Google didn’t go anywhere. The same way as it was before they do not take a part in the main serp. They just stopped marking them, that is it.
Still the same but Google Disables Supplemental Results Command and it now hidden.. Here's the link proof --> www dot webpronews dot com/topnews/2007/07/27/google-disables-supplemental-results-command Just replace the dot with period... I can't post live link yet...
Just search site:exmple.com/* to find non supplemental pages. Use site:example.com to find all and substract. Use this method at top level not deep in directory structure.