I find that most record labels are over processing their music. On average they are +1.5 to +3db clipping.
As an example on a 20 songs the breakdown is usually for me, 8 songs Clipping at +3.0db, 10songs Clipping at +1.5db, 1 song at 0db and 1 song at -1.5. Using MP3 Gain at max no clip gain I bring them down to 0db.