that is not right. here is a link telling the process of making a CD. the data is pressed onto the cd.
http://eil.com/explore/guide/cd_making.asp
ive been in school for 3 years taking music recording classes. i have recorded 2 of my own CDs, and had them professionally pressed.
Edit: im sure there are some people that create their own CDs by burning them, but a major record CD is pressed. that link that you posted. im sure there are quite a few guys out there using them, especially guys that bootleg CDs.
edit 2: found a video showing the process of making a disc
http://youtube.com/watch?v=rc8iltCqrms