Thanks for your excellent review, H3rB3i!
Some thoughts in random order:
You use test firmware for burning and you mention the difference between official firmware and test firmware in some places, which I really like.
You mention that the drive will read 16x rated DVD+/-R media at 16x, and lower rated media at 12x.
AFAIK this limitation is removed in the later test firmwares. I'm not sure of which test firmware version, however.
The limitation probably won't be removed in official firmware, however, if I understand Wind correctly.
You mention the feature known as Online HyperTuning (OHT) briefly but you don't explain it. I'm not sure if this is a deliberate choice or not. In order to enable/disable OHT an experimental SmartBurn version 3.1.16t must be used instead of the official version 3.1.16 (without the "t").
You test the Plextor branded Taiyo Yuden 16x DVD+R (YUDEN000 T03) media and the result has a fairly high PIE level.
Though I don't have this drive myself, I know from all my other drives that there is a significant difference in the PIE levels depending on which T03 batch/lot is used. In fact I started a thread about it a while ago. I'm not sure if or how you would account for that in the review, but it can definitely be a factor when comparing with burns made on other drives!