It absolutely is, but there's even more to it than that. From their documentation (http://www.tiobe.com/index.php/content/paperinfo/tpci/programminglanguages_de

It absolutely is, but there's even more to it than that. From their documentation (http://www.tiobe.com/index.php/content/paperinfo/tpci/programminglanguages_definition.html http://www.tiobe.com/index.php/content/paperinfo/tpci/progra...): "In order to filter out false positives, two mechanisms are used. First of all a confidence is defined for a language. By default the confidence is 100%, but for some difficult search queries such as "Basic Programming", the confidence will be lower. Apart from the confidence, sometimes also exceptions or mandatory additions are used to weed out false positives." What they do is that add the term "+Google" to the search terms, yet for the other incredibly popular word "Rust", they don't add "+Mozilla". TIOBE is laughable.