That Opera has a 2% market share is wrong. It actually is so different depending on which part of the world you are talking about that it's quite useless to talk about global stats. In some places Opera is the #1 or #2 desktop browser.
But mobile browsers are far from irrelevant. Opera's mobile browsers use the same engine. So ignoring mobile user numbers just because it doesn't match the "Opera has a low market share" meme is not very useful.