I think this is probably exacerbated by the comments with most votes being at the top of the page (but that's also the value of the system). For stories with lo

I think this is probably exacerbated by the comments with most votes being at the top of the page (but that's also the value of the system). For stories with lots of comments, I'm sure many people only read the top few and are hence more likely to further vote up an already highly voted comment. I guess the solution is to find someway of giving emphasis to new comments that have not yet had chance to be voted up. I like the simplicity of the current voting system though.