Are there different read speeds for WORM media vs. their rewritable counterparts? I guess it's down to the rated read rate for a particular media dependent on the drive manufacturer. But, let's say, a drive is rated for 16x DVD-R/ROM read speed. Does this mean a read speed for a 4x DVD-RW will also be 16x? Probably not, but I don't know, hence why I'm asking.