Ajax usage survey among .NET developers
Following the more open-sourcey informal study that was recently advertised on Ajaxian, Simone Chiaretta publishes and analyses the results of his own study that he recently made and that is aimed exclusively at .NET developers. While Richard Monson-Haefel's study is being made for the third consecutive year, which makes for some interesting trend information, Simone's analysis is more directly interesting to us. The differences between the results of both studies for .NET developers also goes a long way showing how such data crucially depends on who you're asking. Case in point, it's pretty clear that the intersection of Ajaxian readers and .NET developers is much more open-source-oriented (not that there's anything wrong with that) than the mainstream .NET developers.
http://codeclimber.net.nz/archive/2007/12/21/.NET-Ajax-Survey-results.aspx