That reference doesn't appear to answer David Gugg's question, all it tells us is that SMB storage is storage shared at the file level. In other words, it's a particular case of shared storage.
The original question is not very good, since getting it right requires one to pretend that SMB/CIFS isn't a form of shared storage. I guessed that the author thought shared files weren't shared storage so the question wouldn't count SMB/CIFS as shared storage, which seemed a safe bet as some BOL pages seem to have been written by people who believe that, so I got a point. But giving an answer that is clearly wrong (because shared files are just as much shared storage as are shared drives) just to get a point is not something I liked doing.
I don't now where all the 8 and 16 answers came from though. More people so far have picked one of those two numbers than have picked 50 or 25, which suggests too many people don't know about SQL Server 2012 capacity limits.