Here are the writing speeds, taken from the specs.
DVD+R: 16x CAV, 12x Z-CLV, 8x Z-CLV, 6x Z-CLV, 4x CLV, 2.4x CLV
Oddly enough, they also list 13x CAV
DVD+R DL: 4x CLV, 2.4x CLV
DVD+RW: 4x CLV, 2.4x CLV
DVD-R: 16x CAV, 12x Z-CLV, 8x Z-CLV, 6x Z-CLV, 4x CLV, 2 CLV
Here too they list 13x CAV
DVD-RW: 4x CLV, 2x CLV, 1x CLV
I dunno about these. CAV and Z-CLV?
CD-R: 48x CAV, 48x Z-CLV, 40x CAV, 40x Z-CLV, 32x CAV, 32x Z-CLV, 24x P-CAV, 24x Z-CLV, 16x CLV, 8x CLV
CD-RW: 24x Z-CLV, 16x CLV, 10x CLV, 4x CLV
"Blu-ray is just a bag of hurt." - Steve Jobs