Mobile search could grow from 9 percent of all queries this year to 20 percent by 2012, estimates RBC analyst Ross Sandler in a new report issued today. There is still a huge gap between mobile’s share of overall search queries and its share of search advertising. Sandler estimates that mobile will still represent less than 2 percent of search ad budgets this year, compared to the 9 percent overall share. But he thinks that gap can narrow and that mobile search advertising can be a $2 billion to $3 billion market in 2012.

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