The Comparative Productivity of Programming Languages | Dr Dobb's
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Also -- ASP is not a language, unless they're talking about VBScript, which I would have thought would be lumped with VB.
Sounds like a blinkered enterprise Java-centric worldview to me. To have ASP as the only scripting environment listed is just plain crazy in 2012. If you're going to include scripting at all, where are Ruby, Python, Perl, PHP, Javascript? If you want to talk about the productivity boost from high-level languages, you have to include these.
PHP was still a bit surprising, but the answer might be in the list there, too. Any list that ranks classic ASP, COBOL, and C# has to be working with source data that represents a very particular and non-representative corner of the software industry. Of course with a chance to look at that data costing €5,200 we can probably only speculate. . .
Reminds me of the Monty Python killer joke sketch where the joke is translated by a team of people line by line.