tangor - 11:12 am on Oct 12, 2011 (gmt 0)
If SEO is meant to be "game Google" then yes, things have changed. The Google does not like it. If SEO means "getting everything right FOR THAT PAGE/SITE" then nothing has changed.
Personal opinion "YOU" is what you want to do: YOUR USER OPTIMIZED. Made that decision back in 1999 and have not "failed" since.
I look at the percents from each source and max those. G might be bigger, but B is AS IMPORTANT and for a time ASK and YAHOO. And those percents maintained because sites were optimized for the USER, not a search engine. YMMV.