Crash Landing said...
What you've all failed to mention (if I've missed it - sorry) is SKILL. People who are better at getting planing in light winds can take out a smaller sail and therefore hang on for longer when it picks up.
I know of people who are planing on 4.7s when others are bogging on 5.7s - and there isn't much difference in weight.
There are a lot of variables in this. A different sail, a different board, and as you say, differences in skill.
I occasionally get people telling me that my sail is too big when they are on 5 - 6m sails and I start out with a 7.5m. I think they underestimate my weight, because its rare that I have to drop down a sail size. (Is this anti-skill?)
I think the only way to compare someone's skill is to have them on the same equipment and match their weights. So far no one has been willing to take up my challenge of sailing with 30kgs of weight strapped to their board

Even then, its not really the same.