maybe this is of help...
its from a site for photoshop competitions online and it explains marks from 0 to 10 in a (to me) fair way...
1 - Any entry you rate a 1, should be flagged at the same time. If it's so bad as to deserve a 1, it shouldn't be on worth1000. We don't need to list examples. You'll know them when you see them.
2 - Any entry that is horrible. It probably should also be flagged.
3 - An entry that is below average. Definitely needs that extra hour of work or thought. Easy things have been ignored.
4 - An entry that could have been good, but is missing that extra 15 minutes of work or thought behind it.
5 - It's average. Not great, not bad.
6 - It's better than average.
7 - Great idea and execution. It's much better than average.
8 - Terrific idea and execution, and something that sets it apart from just being "great".
9 - This is almost perfect. The idea and execution are fantastic and there is a special something that makes it really stand out.
10 - The execution is perfect and the idea behind it is brilliant. This is the best thing I have seen on this site in a while. "Wow!"
the stuff in there about working on it a few more hours could be translated to months of practice for kites...
and flagging is not done here but I think that only a kite not staying aloft longer then 10 seconds and then crashes should get a 0