Originally Posted by V_RocKs

I did my own test of two of my sites... What I found is that sitemaps don't make any difference what so ever. Both got indexed at the same pace. Both have similar search results. It didn't make any difference what so ever.

I also did a test with them on whether or not it was worth it to make sure duplicate content didn't show up on all pages. That didn't seem to do anything either... Google seems to know that blogs will have duplicate content on archive, category, tag, etc pages and doesn't seem to give two shits.