This one clearly shows how biased digitimes is
http://www.digitimes.com/systems/a20061011A6026.html
First no word on infomedia. Infomedia had Philips (full) approval much earlier as any own media of Ritek and CMC. Infomedia is still making 16x DVD+R
Then next Optodisc is ignored. Why they talked earlier about optodisc 16x media having a price cut.
Same for PRinco however in that case you might be able to say maybe there not there because princo dvd recordable disc isn't a real dvd recordable disc thanks to not paying the correct licenses which are needed.
Also what is prodisc doing there ? They might make 16x rated recordables but under the current situation I think prodisc does not have all needed licenses so these disc's aren't DVD-R's or DVD+R's at the moment.
For Princo & Optodisc reference on digitimes check.
http://www.digitimes.com/news/a20060822PB201.html