mhansen - 10:38 pm on Dec 5, 2011 (gmt 0)
We have quite a bit of niche specific, industry expert buying guides that are being pushed from #1, to #11 in SERP position. Replacing us are 10 "answers" type listings (Yahoo answers, eHow answers, Ask answers, etc)
I checked several of our pages that typically ranked in the top 5 for phrases beginning with: how, why, will, etc, and seeing several with similar trends.
I assume this is related to the "weather report [webmasterworld.com]" offering more longtail relevance.