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We have a user interested in having a WordPress 3.5.1 blog on their own existing, robust site. There is a blog module available in the CMS but the user feels more familiar with WordPress. It will be set up at the root as a subdirectory. Based on the URL structure, Google should see the WordPress blog and the user's website as the same website. (www.website.com/wordpress). There will not be a 301 needed. Does using the Wordpress module impact rankings? We've understood that Google doesn't care for Wordpress because 99% of spammers use it... is that only if it is hosted on WordPress.com? Also, are there any other reasons that our user should use/avoid WordPress?