Will consumers want to show to their whole Google network what they used and reviewed? Giving a camisole a +1 on Jockey.com connects my personal shopping habits with my email, blog, Google+ network, YouTube and Adsense accounts. This might be a bit too-much-information.
Will consumers give a +1, in addition to using a 5-star system? Within the PowerReviews system, consumers still have regular features to rate a product on a star scale and write reviews. Clicking on the +1 would mean I want to make sure everyone hears about what I have to say. What percentage of consumers would go through the extra step? Will we see a correlation between types of reviews, average star ratings and +1's?
How does the +1 system benefit the ad consumer? If I am sharing so much information about my likes with a giant advertising platform, will I get more targeted, useful ads? How would this type of information matching make consumers feel about using the +1 button or clicking through online ads?
A substantial group of people use the +1 button, across 1 million+ sites. Coupled with consumer review content, Google will be collecting considerable data on the most outspoken word of mouth agents who regularly publish their opinions online.