The German computer magazine c’t announces a postponement of the PX-716:
Here a try of a translation (sorry for bad English):
Plextor postpones the sales start of the new 16X-DVD writers PX-716A approximately one month to the end of November/at the beginning of December. The quality control is dissatisfied with the current burning results yet; they only want to deliver the PX-716A if it supplies a good quality with the highest burning speeds too, was called from the European business center in Belgium.
With the hunt for higher speeds the burning quality drops out of the race.
As the c’t already determined in an extensive comparison test in the issue 21/04, the error rates rise clearly at speeds beyond of 12X and depend very beyond that strongly on the media and the burner model. The reasons are to high tolerances during the media manufacturing, especially in the external area of the media – which will be burned which with the highest speed – fail most highly. The burners can only insufficiently compensate or be content with slower speeds.
Due to an alleged market pressure nevertheless many manufacturers publish their 16X burners with unsatisfactory write attitudes and try to improve the write quality with later firmware updates. The mourner is the customer, who has to fight with badly readable DVDs and which risks security of its data.