enigma1 - 3:30 pm on Dec 30, 2011 (gmt 0)
@londrum, what's the keywords density percentage you tried? Is it over 5% for your competitive keywords?
What I tried over the past year or so by adjusting the keywords density with some pages, when I increased it seemed to initially increase traffic and page positioning, but then it dropped. So I cannot tell if it's the content freshness factor or the keywords density change itself.
I also see even if the keywords for the title and meta-tags are relevant but broad vs the main content and the later is too specific you may get the -50 or -100 penalty. For example a products listing in a category page:
title and tags about the category page: general widgets
main content listing:
specific blue widget brand-X item
specific red widget brand-Y item
Page maybe considered to have very thin content and little relevancy. At least under normal circumstances, it doesn't affect other pages or the entire domain from what I see.