I think what these arguments are missing the fact that quality LBS make their money on service, and not selling the bikes. It becomes even more lucrative when a buyer returns their bike regularly for servicing. An LBS that caries one or more touring bikes is a sign that they place an importance on service since they know that not only will they own this bike for a long time but can return for regular servicing. In my region, the best LBS have many good touring bikes to offer. One even builds their own (Bertrand).
Sounds to me Bike-a-Boo that you need to shop for the right LBS first.