He said that anyone who could fly a Harvard well, would be easily able to fly most other warbirds.
My Harvard pilot told me the same thing. He said good on the Harvard, you could check yourself out in the P-51. He'd done the P-51 course. That said, I was flying the Harvard from the back seat, and the view was pretty minimal for landing. I have great appreciation for a pilot who can land a Harvard well from the back seat! Conversely, I flew the Stearman from the front, and landing it was easy.