Freddoso opens by asserting that no major candidate for U.S. president has received less critical examination than Barack Obama. Personally, I think Freddoso's correct on this point - I read Obama's "The Audacity of Hope" and found it devoid of substance.
On the other hand, it is difficult to assess Freddoso's credibility and objectivity, especially after reading "Blinded by the Right" by David Brock. (Brock's mea culpa revealed a history of distortion and sliming by writers - including himself - for Regnery Press and National Review.) Further, neither are known for credibility and objectivity involving the left.
My guess is that the truth lies somewhere in-between Freddoso's assertions and those of Obama supporters - but, I would not be surprised to find Freddoso eventually proven mostly correct.