The survey data is very global with just less than 50% of the respondents being from US companies. The remainder are from almost every major geography with western Europe, Australia, Canada, and Mexico being the best represented (from a researcher's point of view though, pretty much every geography is well-represented because of the size of the dataset).

It's also important to call out that the "discretionary effort" cited in the article isn't just "more hours". It involves productivity while working, likelihood to bring new ideas to managers, etc...

There's a video here of the research director cited in the article walking through the results in more depth. The really interesting thing isn't that satisfaction has gone down, it's that *compliance* has gone down within IT. (ignore the last ten seconds of salesy-ness in the video.)

http://www.youtube.com/watch?v=WD08P6kYCuI