McMohan - 12:33 pm on May 6, 2013 (gmt 0)
these may never be out of the index
Pages in a folder can be removed from google's index through URL removal tool on WMT. But there are many, thousands in fact, such as search result pages, that are not in a particular folder but generated through dynamic queries. They are now disallowed through a wildcard in robots.txt. Will they always remain in the index, unless you deindex the whole site?
P.S: Adding META noindex/nofollow to those pages doesn't seem to be possible, given the way the site is built.