I know very little about X/TL and QL BD media. I've never burned one before, either, but I was wondering something about Verifying an image burned to one of these kinds of discs.
With DL DVD+R and BD-RE, which I have burned, Verifying Layer 1 causes the read speed to gradually count down to lower values from the height of the read speed of Layer 0. This is because the reading goes in the opposite direction on Layer 1 when Verify puts the laser to the end of Layer 0. But, what happens when Layer 2 or Layer 3 are read?
Does it gradually increase again on Layer 2 to a maximum read speed? And, on Layer 3, does it gradually reverse backwards like when changing from Layer 0 to Layer 1?