This is digital data. Burn speed cannot affect image quality. Either the bits are there to be read and they will be read exactly as they were written, or they can't be read at all. What can happen with higher burn speeds is you might get a disc that can't be read in some older players. But if it can be played, it will look the exactly the same on the screen whether you burn at 1x or 16x.
I'm not referring to image quality when I referred to errors. I'm referring to digital errors that can affect whether the disc will playback or not, or will skip or freeze.
I guess I missed the relationship of image quality to burn speed.
All DVD and CD players have built in algorithms that attempt to reconstruct the data that might be "messed up" when being read from the disc. I would imagine that the players ability to reconstruct missing bits would be a factor in this.