IMHO, I think the author is wrong. Obama did it too soon. He should have waited until Sept. of 2012 to release it. That way, it would have kept the goofy issue alive throughout the GOP primary, causing a major distraction and damage to whoever would end up being the nominee.
By releasing it this early, he's effectively guranteed the issue won't be on the radar next year.
An unforced error, in other words, but I'll take it.
Their internal polls had to really suck on this issue so they had to make a move. Much information still remains hidden...this isn't over.