That is pretty right, in college, we used to go over polls alot (I was a government and politics major), and all through college it showed that the pro-life numbers were going up, but there are a few hitches in that.
Off the bat, depending on the poll, many of the pro-lifers fall into the category of regulating but not banning abortion, or "exceptions for" crowd. Its hard to gauge exactley how many people are solid pro-life in terms of wanting it banned completely.
The strange hitch that we all noticed and it caught some of my lefty teachers for a loop, and even some conservatives was that in the same and equal proportion that there is a growing opposition to abortion, there is also growing opposition to the death penalty. I.E. your growing pro-life crowd also opposes the death penalty. Opposition to the death penalty's increasing in percentages and number correlates almost exactley with opposition to abortion.
Thats sad, if people can't tell the difference or care, about killing the innocent and killing the guilty.