Majestic SEO can see it because it provides a report on how many C blocks send you back links or mentions/citations. However, the best they offer is a summary by referring domain, sorted by IP. You might find that in Link Research Tools as well if you have the budget for it.
Traffic Estimate Differences Between Google Adwords and Search-Based KW Tools
1/14/2009 Google provides monthly traffic estimates by KW in both its original Adwords Keyword tool (ADKWT) and its newer Search-Based Keyword Tool (SBKWT). In some cases the numbers reported are similar, but in most cases the monthly traffic numbers appear to very different, with the SBWKT numbers being only a fraction of the ADKWT. Here are some examples taken from a "business intelligence" search with each tool.