On February 26, 2009, Google software engineer Matt Cutts collected questions on Google Moderator and answered many of them on video.
Sven Heß from Wiesbaden, Germany asked:
How accurate is Google's backlink-check (link:...)? Are all nofollow backlinks filtered out or why does Yahoo/MSN show quite more backlink results?
San Diego Tim from San Diego asked:
If you have inbound links from reputable sites but those sites do not show up in a link:webname.com search, does this mean you are not getting any 'credit' in Google's eyes for having inbound links?