Well, my LBS likes some WSD bikes. There are a few which do have the seat angle kind of messed up and you can end up positioned too far forward of the crank. In other words, yes, to what he said. But not all WDS bikes are equal and this problem may not occur in all sizes and definitely not in all brands.

I'm 5' 3 1/2" and very shortwaisted. I've never ridden a WSD bike. Haven't a clue if it would serve me well at all. I've always bought my bikes based on top tube length and then used components to fit my smaller everything (bar widths, Campy levers, short cranks, etc.). That said, I've always had my bars fairly low on purpose. A stem with a bit of rise would bring them up if I had neck issues.

Are you set on having a Pilot? What does your own LBS have and did you like it?