I have a site that went through a restructuring about 9 months ago. One of the subfolders /pages/ no longer exists in the new site and the server returns either a 301 for pages that exist on the new site (in a different place) or a 404 for ones that do not.
But, I also have a Disallow: /pages/ line in my robots.txt. Will this make it take longer for these pages to be removed from the SEs since they cannot get to the 301 / 404 codes?