I'm not sure I'd say well prepared; he had a good boat. If he'd had a handheld radio that could withstand a dunking and a PLB and maybe a back-up solar system to keep batteries charged, I'd say he was prepared. One knock-over though and he lost propulsion (sail and motor) as well as comms.

Apparently there was more comm, nav and signaling gear in my aviation survival vest than he had in his boat. My vest and everything in it was designed to get (IPX-8) wet. Things get wet in a small boat on the ocean, you need to plan for it.