^How accurate do you think the PCA numbers are? It doesn't surprise me that it is more pro-choice than Southern Baptists and Mormons, but it seems hard to imagine a majority of its members support abortion rights.
That poll also had a significant majority of Americans as pro-choice, which has been conflicted by other polling firms like Gallup and CNN. It probably has the right order of support between denominations, but, since abortion polling is very dependent on wording, is probably too favorable to pro-choice positions as a whole.