Sadly, a lot of recorded music doesn't use more than 12 dB of dynamic range. They apply extreme dynamic compression to make it sound as loud as possible, meanwhile squeezing the life out of the music. Modern Rock & Pop are the worst culprits here.
That depends on how you measure dynamic range. I have some acoustic music recordings that use 60+ dB of dynamic range. That is, in a few very quiet PPP parts with music playing the digital VU meter is measuring -60 dB. In dynamic peaks FFF it hits 0 dB, or gets within 1 dB of it. So you could say the track uses > 60 dB of dynamic range. These tracks are impossible to listen to in a car, but are wonderfully natural and realistic sounding in a good quiet listening room.
However, the DR14 tool might rate this same track as DR15. That's a different measurement, essentially the ratio of peak to RMS amplitude. It's possible for the RMS value of amplitude to be high, say -9, even when the amplitude hits minimums of -60 dB or lower in a few places.