Perhaps I should remind people what kind of audience post in these forums.
As with most technology forums in the world, most of the people who post here post because they have problems. People who don't have problems usually don't bother to post, unless there is a tightly-knit community of regulars who like to show off their latest results regardless of quality.
Look in every forum, and you will see that there are people who have problems with every brand of drive. If you go by the numbers in these forums, you would probably think that every drive is a piece of junk. But that is simply not true. If you look at broader numbers, you will find that the vast vast majority of people do not have serious issues (and yes, this even applies to LiteOn, even to my own surprise).
Pioneer looks especially bad at CDF because you have the people who have problems posting, but unlike forums like BenQ or NEC, you don't have many people who are enthuiastic enough (or unreasonably obsessed enough) about the drive to go around posting a scan of every other burn that they make, which gives off a false image.
This is a problem common in forums like this, and so I remind you to keep an objective mind, and if you make any claims like this, you should back it up with solid, objective evidence taken from a reasonable sample set.