I have bought 4 sets of M520 pedals and they
all came with standard cleats. I have never even seen multi-release cleats in real life (as opposed to in online or magazine articles) and never felt the need for them. It is incredibly easy to unclip standard cleats if you set your pedal release tension low and spend a few minutes getting used to unclipping.
I think the problem that some people have is that they
don't reduce the tension settings,
don't practice releasing, and
don't think about it until the exact moment that they want to unclip for the first time. There is a sudden realisation that the foot doesn't just come off the pedal the way it would have done before switching to SPDs, panic, topple over, ouch ...
It should only take a few minutes to get used to the slight rotation of the heel needed to unclip a foot.