I recall quite fondly a mixed regatta in Sarasota many years back. They put us in a short course with a bunch of 420s.

Picking our way downwind was fun, especially since we'd go flying by realitively quietly and they never expected us to go so quickly past us.

I was going above one 420 downwind and had to single trap as we picked up a header right behind them. Probably hit 15 kts as we went around them (doing about 6). I thought the spinnaker was going to brush their spin pole. The collegate team was duly impressed, and they (along with their parents on a coach boat) asked us about the boats between races.

Only drawback (besides having to pick our way through the fleets) was trying to start with them all bobbing around the PRO boat with their coach boats in tow...