deadsea - 4:47 pm on Sep 26, 2011 (gmt 0)
The main two word terms has the first word which is the general theme and a second word which is the specific topic. In WMT my site has a full significance bar for the second word and a 60% fill for the general theme, first word. I would guess that sites that have done best from Panda have this the other way. ie a full bar for the theme and somewhat less for the specific topic word.
The significance bar in WMT for each term is largely driven by the number of pages on the site that mention the term. We found that it was showing lower significance for some of our main terms but high significance for some generic terms that we used heavily in template copy.
We went through our template copy and replaced the generic terms with the specific keywords for which we wanted relevance. The WMT report responded within a couple weeks. It didn't have any effect on the amount or type of traffic we were getting. Panda rolled out the next month and that site was not hit by panda. The work we did there could have been the deciding factor, but I really doubt it.