Having done both FAA and JAA CPL, I can't understand why it takes 25 hours to reach the standards for the JAA CPL. No new maneuvers, just tighter standards than the PPL.
I could understand with the FAA CPL as there are chandelles, lazy eights, eights on pylons etc. 25 hours to learn the local area, tighten up the standards and learn how to fly a wobbly prop and retractable gear seems excessive to me.