The columnist Salvator labeled Man O' War "a speed marvel" - compared him to 1870's star Ten Broeck - claimed he never proved himself as a race horse - and called his match race against Sir Barton "a circus act" claiming everyone knew Sir Barton was off form battling physical issues.
Interestingly though - he was a very strong defender of Man O' War as a stallion. Writing entire columns mocking those claiming he was "an overrated sire" later into his stallion career.
Here's all I could find of Vosburgh's takes on Man O' War:
Speaking on his crop at age 2:
After his Belmont Stakes win:
Speaking high praise of him a few years after his last race in a column profiling past Belmont winners:
Other than Man O' War's Belmont - I could not find a sensationally fast race of his. His Preakness was not fast. His Travers was not fast at all.