http://forum.square-enix.com/ffxi/th...776#post552776

Experience point acquisition while in a party has been adjusted to be the same as in Seekers of Adoulin areas. As a result, experience point gains while in a party have been increased.
It doesnt say cp, but i can test it tonight im 99% sure people wouldnt do ae cp parties in escha if it gimped your exp/cp.