Does PageRank effect my rankings at Google?

In short, yes PageRank does effect how your website ranks in Google. The PageRank™ system was designed to be yet another factor in how pages should ranks, it is not the only thing that matters however. When you do a search at Google, the highest PR websites are not always placed at the top. Sometimes a page with a lower PR can outrank a higher PR website if it is better optimized for the search terms.