I remember the 1st November OFC g2g we had at Quinte a few years ago and it was extremely rough, but the only boat that was swamped was a big bass boat. They sunk that boat down in the water all the way to the gunnels and the 3 guys aboard were up to their knees in water.
Some guys say their OK for rough waters, but when it gets nasty out, I'll take a deep-V anyday.