I have read so many contradictory reports of the merits of various burn speeds online that I no longer know which to trust -- many of them backed with seemingly-convincing bitrate graphs that apparently demonstrate x, y and z. Despite sustained periods of experimentation with both high and low speed burns, I experience failed DL burns -- by which I mean burns that fail Imgburn's verification process, and which I therefore discard -- with equal frequency at high and low speeds.

I currently burn Verbatim DL at 2.4x speed (despite the fact that the discs are the new 8x discs, not the old 2.4x discs), which seems to produce fewest burns - though that might be my imagination. I find it hard to have any opinion on the matter, other than the opinion that the issue polarises people and I fail to see the justification for having deeply-held convictions either way.