I think tiobe is based on google hits (not exactly sure). You may find this interesting:

http://findarticles.com/p/articles/mi_hb5558/is_200712/ai_n22055964

Wireless News 12-03-2007 Info-Tech Research Group Survey: Popularity of .NET is Dipping into Java's Market Share WIRELESS NEWS-December 3, 2007-Info-Tech Research Group Survey: Popularity of .NET is Dipping into Java's Market Share (C)2007 10Meters - http://www.10meters.com Despite commonly held assumptions in the developer community, Microsoft's .NET platform is more popular than Java among enterprises of all sizes and industries, according to recent research from Info-Tech Research Group.

It's difficult to find something recent -

I just checked and according to tiobe, The ratings are calculated by counting hits of the most popular search engines...


>Well according to tiobe.com
>1. c
>2. java
>3. vb (includes vb6)
>4. php
>5. c++
>6. perl
>7 python
>8. C#
>
>dice and monster set java as the most wanted by employers.
>
>So I would say that should backup my statement. Other than that what can I say. Can you do the reverse. Show me the .Net is the market leader.