I was thinking the same thing, Wesociety. My TY's look lovely when burned at 8x or 12x... normally get a little spiking at the end if I burn them at 16x like that with the same drive/firmware the OP has.
Otherwise, those scans look good. I'd also guess that RicohJPNR01 was burned at 8x instead of the rated 4x from what bit of PI Failure clustering at the end although that certainly is still passable.
But what is up with that CMC Magnetics not having any PI Failures done on that scan? A little odd there. Only thing I can figure is because of the Maximum speed setting in Nero CD/DVD Speed 3.61.