lucy24 - 3:07 am on Sep 16, 2012 (gmt 0)
If you're in Google Webmaster Tools you're most of the way there. It's
:: shuffling papers ::
"Fetch as Google" under the "Health" tab. You can also try "Blocked URLs" on the same tab. This shows you the robots.txt that g is currently using. (They took away the "make a robots.txt" part, but the rest of the page is unchanged.) If there's a robots.txt displayed at all, then you know they are lying in their teeth and they had no trouble finding the file.