Reports of my (simulated) demise were greatly exaggerated. I survived the (simulated) Big One!
A couple local news stations seemed to be covering various exercises in the area when 10am rolled around. I saw some green hard hats and vests at one scene on TV, so probably some CERT drill on this one channel.
I had hoped that at least one channel would broadcast the slick video I linked to, above, but I didn't see it on any of the channels that I checked. All that happened was that the normal TV program went silent while a generic message about a "required test" scrolled across the TV screen, just like your normal weekly EAS test message. I turned the TV on slightly late so I'm not sure if there was any audio mention of the Great Southern California Shakeout or not when the EAS was first activated.