I think what John's trying to say is that they certify it when the drive can do it with no extra software interferance, outside of what is needed for the funtionality of the drive. This interferance includes such things as changing settings in the software, or even going so far as to go and change you Lacolity to UK or Canada to get something to work, something that without which you may not be able to do what you want.
The original question was a good one, and showed good forethought before buying a burner. The answer was good and after explanation was a valid answer. Brand loyalty is great, but there IS such a thing as too much. And it's true what you said too Laffin, even with the setting set it is sometimes impossible to do it on certain drives, mainly because the options may have been physically disabled in the hardware, as is the case in some Sony branded drives