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I am looking at re-structuring so there are no subdomains and all content follows the /
Assuming I use correct 301s would you guys see this as a recommended move?
If you have verifed any of those subdomains through Webmaster Tools, make your changes in there, too.
As a tip for research, a Site Search [webmasterworld.com] for more threads on the topic will get better results using either the word "subdirectory" or "directory" rather than "subfolder".