@komo95,
I'm with you on this one.
Do you think 400 people have gotten it so far? I don't think so, unless the answer has been leaked. I think at least a few have solved it. Apparently, one solver said it was mostly (all?) math, while another said it was mostly Neo-related, so at least some of the "solvers" got it wrong.
There may have been one or two posters who said they solved it the day after, but it definitely seems like the vast majority solved it in 5-10 minutes (even if it took time to figure out the final answer). If these posters are accurate and honest, then it doesn't appear that the answer hinges on, say, looking at the word count for all previous LCs and putting them in order, as that would take a substantial amount of time just to see if that's the answer. It also doesn't seem like the answer would be in some extremely esoteric area.
I didn't see any clues in the lookups for the people who claimed to have solved it.
Here's a handy petpage that contains all the puzzles / answers up to 398:http://www.neopets.com/~beaminess