@Tyler
Pressed media will always read much faster because it is much easier for the drive to notice the transition from or to a gap on the track, due to a higher reflection coefficient.
With recorded media, the reflection is much lower (about 30% or less), hence the drive has a harder time finding out the transitions, hence you get a higher error rate and to compensate for that, the drive has to reduce its speed.
Try ripping any macrovision protected original and you'll notice it will stay a constant 2x, while ripping your backup you'll see that it may just break the 2x barrier.
I've been using hacked firmware for my Pioneer 105 for a while now and it lets me rip protected originals much faster.
For more info read a few stickies
here