Not sure if this is just me, but Google autoupdate is just broken for mac. It pops up even when the program is not running and the update only works if the current user is an admin. It does not prompt for admin password like all other updates do. And there was no way to not have autoupdate. That led me uninstall all Google software a while back.
I really do not like google's policy on updating. It presupposes that any organization has a lot of bandwidth and doesn't mind updates going off at inconvenient times. Since one of the places I work at has a couple labs of Macs and does video classes on the same internet connection, I see a real annoying situation.
Yeah, well Google Earth isn't. This is where Microsoft and Apple have a clue. Let sysadmins have a central internal update server that can be controlled.