I will chime in to say that I do find "Barak Obama. President" a bit arrogant and offputting. Just like that faux presidential seal they came up with.
It does make it seem like they can't even stoop low enough to say "Barak Obama for President" and give at least lip-service to some humility before the electorate.
If you've seen that language on his ads, can you tell the rest of us where to find it?