Does Google tweak their algo for different keywords...

...could explain a few things...

[sarahp]

It would make sense for them to do this...

They can remove spam and commercialised sites for highly competitive keywords...

Whilst leaving the genuine results for information, not commercial sites which generally attract less spam... and cynically less adword revenue...

It would also confuse the heck out of us optimisers since we will then say... "no thats not your problem since that SEO technique works for me... try this technique instead"... when in fact 1 change might work for 1 algo... and another for a different one...

Any Thoughts?

[Stefan]

There was a lot of speculation on that post-Florida. Certain commercial serps were hammered, (real estate, travel, etc), that seemed to some webmasters to be kw specific.