According to cnet, Zuckerberg stated the following quote in regards to Graph Search on the call :
“Pretty soon, I think, you should expect us to roll out the mobile version of this. I think that that’s going to be an important step, because most of the usage of Facebook overall is on mobile, so we expect that that’s where engagement will really start to come from on Graph Search over time.”
This will be a welcomed feature for mobile as Graph Search seems like a product that was really made for mobile. Using quick search queries to see where friends are, and what destinations are nearby.
So what’s the reason that the rollout has been so slow? According to Zuckerberg there is great complexity in indexing more than 1 trillion connections and status updates. He further noted:
“As a number of people on the team…have told me, a trillion pieces of content is more than indexed in any Web search engine.”
So while you are waiting for Graph Search roll-out you can read more over at cnet, or learn about yesterday’s earnings report.