10/10 shouldn't necessarily mean perfect, but I agree people should use the entire 1-10 scale rather than IGN's 7-9 grading scale. The maps should be graded on a curve, and its score based on how it compares with competitors. Don't use the high-school grading system; 5ish should be the average. If you don't use the whole scale, you are not making the most out of your vote. And remember, mapping standards back in 2008 are a lot different than they are in 2011, even with the same game. If you've ever tried to help keep a custom map server up, you would know that maps with really large filesizes (upwards of 100MBish) can really make a dent in your server population, and becomes rather prohibitive to use. Filesize usually isn't a problem though, since most maps usually don't get anywhere near that large.