At this point Sherman seems to have the McClellan disease -- overestimating Confederate forces and emphasizing his own weaknesses, while asking everywhere for reinforcements.
I'm guessing that in due time, unlike McClellan, Sherman will settle down and soldier on.
It's worth noting, perhaps, that of 53 engagements to date, the smaller force has won only 15% of the time, meaning, as a certain Confederate commander would later say: "Git thar fustest with the most mostest."
General Jubal Early.