Is Oz Goose crew weight sensitive for club racing? Big Small, Single or double handed

A singlehanded Oz Goose and a double hand Oz Goose fighting it out

My friend and knowledgeable critic Tink on the Woodenboat forum asked if the Goose was crew weight sensitive in our  racing.  In other words whether light or heavy crews have an advantage in Oz Goose racing for getting the best speed. We now have two years of club racing experience to base our comments.