Whether or not an existing web site should be redesigned in order to change the order in which content is presented, I doubt that it's worth spending a bunch of time or money, which would be better spent on building links.
We aren't so very far apart, in truth, but because Ms. W continues to present the idea that it makes no matter where keywords are place within the content of an HTML page, either at the top or near the bottom, I am prepared to create yet another trial to illustrate a simple fact.
In building a new web site, I would use whichever layout method would prove most economical, and again, apply the resources saved to a marketing campaign to build links and drive targeted visitors to my new site.
Without a valid examination of the relative value of this one or that, Dan Thies' endless seo debate with Jill Whalen about css vs. tables will never be resolved.