PC Gamer has an article on the PC sides of things - respondents were primarily from the US and EU with Asia accounting for 8% of the responses:
Here are the survey results from the GDC State of the Industry report
The PC is the favored platform among game devs in the US and Europe
GDC's annual poll of game devs shows a strong and rising interest in PC as a platform.
www.pcgamer.com
Here are the survey results from the GDC State of the Industry report