When Quora went down late on the 9th of February, early on the 10 here in Europe, it gave an opportunity to see how popular it was. Would twitter be flooded with paniced users looking for a social media fix like when Facebook went down? Over a period of 15 minutes there were only 9 posts to twitter concerning the Quora service being down.
Ouch.quora.com - 503, Service Unavailable.
Quora goes down, giving an opportunity on twitter to check how popular it is.
— cz (@netshade) February 10, 2013
Now it was only down for about 15 minutes and it may have only been down for certain regions, but this kind of twitter response indicates that the service may not be that popular. I recall than when Wikipedia went down a few years back I had more than 9 posts about it just on my Facebook timeline.