With the yardstick system used here (Australia) the actual conditions do, but rarely have the major influence on the "corrected" placing’s. If you look at the results of any "major" regatta (one where there are sailors of comparable ability sailing in a variety of different classes and size of cats) It is virtually always the "top" sailors who fill the first 10 places, regardless of the conditions, and it is the “lesser” qualified sailors down the placing’s who claim that it was the “conditions” that disfavoured them.
Funny that?