However, as I have said, over and over and over again on this thread and others, I encounter more cyclist on the freakin sidewalk where I live in Florida than pedesterians. Therefore, you really can't make sweeping statements or assumptions re sidewalk cycling. "One size does not fit all."
For example, some don't think twice about riding with traffic. Others mainly use the sidewalk, side streets, available bike paths or lanes. However, I would think that most cyclists are pretty flexible and use a mixture of all the above when needed.