Ann -- If you have a WP blog stick with it as it has natural blogging SEO. My statement was for those who don't have a WP or Tumblr, etc. For them it's a good thing, they are borrowing the SEO from their AW toward their blogging .... and whomever clicks is already on their website.
Example: google search picks up my blog on artistswebsites, but Bing, Yahoo, DuckDuckGo picks up my Artists website not the blog.
EDIT: Wordpress is one of the top on all, but Tumblr is not to be found.