Milo,
More recent AMD Opteron CPUs have used LGA format (socket F, C32, G34) with similar CPU retention clips to intel - I expect that the next generation of AMD desktop chips will do the same. The socket AM2 / AM3 architecture seems to be nearing end of life.
I've had no problems with intel or AMD ZIF sockets over the last 15 years. I've occasionally had a CPU stick to the heatsink and pull out with the ZIF lever still locked, but never any damage to the mobo or socket - or the CPU or pins.
Maybe I've just been lucky, but I'm sure that the ZIF lever is designed to apply a much smaller retaining force than would damage the socket or CPU in the event of a tug of war. I am talking about a straight, vertical pull-out force, not a twisting or rotating force here, as I'm sure that either of these could indeed damage the CPU and / or socket.
SD