I wasn't here, but I heard the bands played at the ferry dock, a good thing! Passing through St. Thomas on the way back from Jost, I talked to quite a few people who were here for the regatta and loved every minute of it.
So it seems a good time was had by all (except a few local live aboard boaters who were kept awake until the wee hours by some other boaters who were having too much fun!).