Do you mean that WebcompA can check out the top 10 ranking sites in Google?
Yes. Actually you can check up to the top 100. Also, once you have that data, you can click on any of the sites, and do a deep link analysis. This will tell you what the anchor texts are that are being used on the site. With this info, you can determine if a site is shooting for the exact same keyword, or if they just happen to be listed because of related keywords. Many sites are only in the top of google because they have a lot of backlinks, but quite often, none of those links actually contain the keyword as anchor text. Jons video on webcompa really explains it best.