You see it often, especially in the forum or blog type of search results. Google shows the post count and author counts near in or above the search result snippet. Here is a picture to illustrate what I am talking about:
But we really never saw a way to complain about this information being inaccurate, which it often is.
Today, I spotted a thread at Google Webmaster Help thread where Googler, Sagar, replied to a person complaining asking for their URL.
Can you please provide the URL to your site, I can forward it on to the appropriate individuals?
The user then posted URLs and Sagar said "No problem. I will forward these on to the team."
So if you are upset with how Google shows this data in their search results for your web site, then maybe join the thread and say so.
Forum discussion at Google Webmaster Help.