From the article:
"...By nature, the outer and inner parts of a disc move at different speeds while a disc is spinning, regardless of format (CD, DVD, Blu-ray, HD-DVD, etc.). While DVD drives can read data at those differing speeds, Blu-ray reads at one speed. ..."
I'll grant him that he is talking about differing linear velocities (speeds), which do vary, and not angular velocity, which doesn't (but could in theory- might have been a system that did this).
Blu-ray reading at one speed? As in, can't read "faster" as it spirals out to the outer edge? Gee, then what does it do, skip around 2 or 3 times, trying to read the same data? Or slow down the disc rotation?
Anybody know what he was really trying to say, or was he just putting out a crock?