Dismissing all WSD bikes is just as foolish as considering only WSD bikes. Each person has unique geometry. That unique geometry may or may not fit a certain bike in a certain size.

Beyond that, from what you posted about your phone call with this guy, I'd avoid the shop like the plague. Maybe he has a strong opinion about the subject, but it sounds like he thinks that the Trek Pilot WSD will not fit a single one of 6.5 billion people on earth. And he was cranky about it!

You have choices.