Independent George: You don't need to test every angle. If you are trying to induce the trigger pulling from inertia, you need the most vertical angle possible where the slide strikes the ground directly....
Given that criteria, the P320 passed all the current tests (and there were many) and by all standards, the P320 is just as safe any other gun on the market....on paper. The only way to be sure a gun is 100% safe to test every possible angle, which is not feasible. So the problem is with the testing standards and maybe more than one drop angle should be tested, but the question is how many? If the standards are updated to include multiple drop angles, then every gun currently in production can not be considered safe until passing the new testing standard.
If so folks, plan on spending more for your guns. Not saying that's a bad thing either.