People are making the assumption that just because scores on old stuff goes down, newer stuff gets higher scores. I don't believe this is the case, unless of course something new got more votes. The way I understand it, if a new page gets the same exact votes by the same exact people as an old page the scores would be the same. What's happening is that overtime, if a person stays stagnant, his/her voting power goes down, and hence the value of the pages that person voted on. At it's max, if I was the first person to vote on something, the score alloted was about 86.08, now it is about 85.89. Around that time, it used to take about 3 votes for a page to get a score of 87, now it takes about 5. If you look at something old that has a score of about 87, you will see about 5 votes.
You can compare the data for these two lovely images. Both have 5 votes and both have a score of about 87. The first is from 2007 and the second from 2011.
http://www.summitpost.org/view-south-to ... 9/c-267593http://www.summitpost.org/gunsight-trip ... 5/c-710002