My link is to an unreviewed abstract for the Pacific Section AAPG...so that is all there is...except his poster or oral presentation (I was not there). What Crane means is that there is not large strike-slip displacement on any of the faults in the southern Bay area or south of there. This includes the San Andreas, Calaveras, Hayward, etc. In other words, he is simply wrong. He does not understand plate tectonics...he does have subduction, but you can't subduct..can't move the plates around, without 100s of km of strike slip on the San Andreas fault system. The central San Andreas fault alone has over 300 km of right-lateral displacement. There seems to be some consensus that the San Gregorio fault has over 150 km. Most of this on both faults is in the last 30 million years.
My editorializing is that just because a geologist says something does not make it true. I'm thinking petroleum geologists and climate change here.
Chris