Anonymous Official Leaks Obama VP Choice

I don't get it.  The headline says, "Official: Obama Picks Biden for Veep," then goes on to say that this 'official' wants to remain anonymous because Obama wants to release his choice via text message Saturday morning. Add to this obvious publicity stunt is the nickname "Veepstakes" for this portion of the electoral process.  In listing Joe Biden's accomplishments, assumingly in order of importance, he is 65, Catholic, has blue collar roots, and is a long-winded orator.  Oh, and by the way, he served as chairman of the Foreign Relations Committee and the Judiciary Committee. Meanwhile, the convention will hold both Democratic contender's names with a roll call vote.  Seems to me like everything could change, both the spilled beans on the VP choice and even the nomination itself.  It wouldn't surprise me. No one ever says the same thing twice.