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I actually meant the new one- not the option that was in Labs. You can access it through:

Optimization>structured data , in the case of the domain I was referring to ( large ecommerce site). It does show the data and the URL that it is on.

You can use the tool in Webmaster tools ( it's new), that will show you the markup on the page. I haven't noticed that the power reviews interfere with the proper structure of product schema.org on my clients.

The tool will show you the mark up and the results.

An even amount of followed vs. no followed is always beneficial. But, the SEO company did you a great disservice buy charging for links that were obviously- pointless. You will maintain your link juice, and page rank- however your theme and overall relevance may be impacted. Removing the links is unnecessary as they are already irrelevant in as much as SEO goes.

They may however be sending traffic which is your goal I assume. With the Penguin update, links have really moved to the forefront in our world. That being said, now you get to build relevant amazing links. Create valuable content, alter your anchor text ( some experts say navigational anchor text is the best now) and look forward to expanding your link profile to be extremely relevant and valuable for your SEO campaign.

Using Google's optimizer, you are telling Google- Hey we are testing here, Google likes to know these things. And yes this is affecting your rankings. Your site in general is pretty keyword stuffed, as the other poster's said. Yet, handling what you can at the level of duplicate content is important. Once you add theoptimizer code to the pages, than Google will know your intention isn't to spam the search engines, it is indeed an A/B test.

Also, when doing this- be careful that both versions of your page get indexed, this is going to cause issues down the road.

I agree with Shane- non converting traffic isn't beneficial, as well as the ip funneling/ domain funnel concept is on Penguin's radar.  While not an immediate drop in rankings when big G hit 's the big shiny re-do button on Penguin you run the risk of  flagged- or flogged as it were.

Thank goodness it no longer works now, Penguin and Panda are crushing these schemes.

These are quite common with auto submission/ Link building software organizations as well.

Run!