The survey is yearly conducted by the University of Michigan and asks 80.000 US American citizens about the satisfaction with their PCs. The results are combined to a score ranging from 0 to 100. The higher the score, the better. Since 2004 Apple is leading the PC manufacturers in customer satisfaction according to the ASICS surveys.
Source(s)
September 2010 Scores: http://www.theacsi.org/index.php?option=com_content&task=view&id=210&Itemid=222
Press Release: http://www.theacsi.org/images/stories/images/news/sept2010_pressRelease.pdf
I am one of the founders of Notebookcheck. My primary focus is on articles about new CPU and GPU technology. With my scientific background (Ph.D. in computer science) I try to put facts before feelings in my work. I have been writing and working for Notebookcheck since 2005.