While I appreciate that such thoughts are merely speculative, to me it sounds like very astute and perceptive speculation. Recall that the severity of FDR's illness was largely kept from the public by the press. Likewise, JFK's infirmities were largely kept hidden, again by the press. It would not be unthinkable for Obama to be beset by serious medical problems that would be covered up both by his behind-the-scenes puppeteers and by (surprise surprise) a compliant press...
Like his smoking...