With all the talk about bad BenQ's I got curious to test my other drive to compare to my Nu Technology DDW-163 flashed to BenQ DW1620 B7T9. I wanted to see if the other drive exhibited the same clumping of PI Failures on Optodisc OR4's. Turns out it does. One drive was made in Taiwan (The Nu Tech - at least apparently it was...) and the one drive made in China. Both were manufactured in September 2004 and originally came with G7H9 firmware so both obviously bulk or OEM drives.
First disc is from the Nu Technology and the second disc was just burned with the OEM BenQ drive that was a refurbished drive. Looks pretty similiar outside of the clumping of PI Failures on the OEM BenQ's burn, however, I'll say that this is normal behavior even on the other drive depending on the media used. Both of these BenQ's appear to be functioning fine from what I can tell - maybe it's the Malaysia drives having quality control issues....
Side note: Both of these discs were burnt at 8x using CMC Mag M01 strategy.
First burn can be found here: http://club.cdfreaks.com/showpost.php?p=848481&postcount=58