In reply to DaveHK:
I doubt overall numbers are high: 17% of all avalanche victims with a lower limb injury from the European data he used, but hard to know how many of those would be due to lack of ski release. Then probably larger numbers of non-avalanche lower limb injuries, again attribution of cause will be difficult, but any spiral lower leg fracture is possibly from a release problem.
If you can reduce a risk, or at least identify it, that's worth doing, as long as you don't just shift it to a different type of risk or injury: there was an interesting discussion on Wildsnow about the different pivot point of various bindings predisposing to different injury profiles: either predominantly knee or spiral lower leg fractures.
The bit I found interesting was that toe pivoting tech bindings like the Vipecs that have been thought to be better for release, may actually be riskier for knee injuries, but better for spiral fractures, than conventional tech bindings that are the opposite.