They need it to sell you glasses so it would be pretty surprising if they didn't measure it. But they may have stopped measuring it beforehand to deter people from buying online.
This is what she said when I called back asking for the PD. She said that they only measure the PD when you sit down and order glasses from them which I think is very possible. I assume places like Coastal, Zenni and WP know this is possible. I have the five free pairs coming from WP so I can see them in person. If I order from them, I will have to give them my prescription and then find out how they suggest getting the PD. We'll see how that goes.
EDIT: My wife tells me that WP has something built into their site that uses your notebook camera to accurately measure your PD. I used the camera today on Zenni (I think) so they could create an image with your selected frame... pretty cool.