Sometimes it's less difficult. For example, it took me a while to remember that the HN search engine is at searchyc.com. And sometimes it's faster: I can get to my uni's website by googling just keio instead of typing www.keio.ac.jp.
The example would have made more sense if the author had said people type "Facebook" looking for "Facebook.com"
I have it mapped to "yc" so I can hit command+L then type "yc some query"