abortion and down's syndrome

As someone who subscribes to the personally prolife, but politically prochoice position, I am in wholehearted agreement with prolifers who abhor people who abort on the grounds of discovering their child has Down's syndrome. This column in the Wash post mentions how abortion approaches 90% for those detected with Down's Syndrome. I am curious if progressive prochoicers find this disturbing. If so, I believe it would help the prochoice image in the eyes of many voters, who believe prochoicers have no moral code or values when it comes to abortion.

Washington Post Column