Well, the USGS is the de facto global authority for a lot of this data collection and research. Their sources clearly show that this type of displacement is typical for seismic events of a certain size. They don't just have data from events in modern history, they have a ton of data for geological events that happened prior to a historical record. If you are looking for people under the illusion that cataclysmic shifts in the earth don't happen, the USGS isn't where you look for them. Some of the horizontal displacements for major earthquakes in the 20th century were as large as a quarter kilometer as well.
Yeah, I've been on the USGS email list for many years.
So, where do the naysayers come from? I don't recall what threads or whom . . . but it seems like any time catastrophism or END TIMES stuff gets tossed around, up will pop a crop of supposed geologically informed sorts who insist that a long list of things have never happened and can't happen. Usually amongst that are sudden huge plate/earth changes.
I've always thought they were ignorant. But as a layman didn't have much to prove it by.