"...Acer is another company that follows the Zone-CLV writing technology in order to achieve ultra high speed recordring speeds. The final result however is much different that what we had tested in the past. The drive even it supports 20x writing speed in specs, behaves like an 16x CLV recorder in real life tests!.."
FULL STORY @ CDRINFO (http://www.cdrinfo.com/hardware/acer2010/index.shtml)