I understand what you are saying. First, the soak test they send out will be exactly the same as the final release. I have never heard of them pulling one back, I imagine it would take a major disaster before they would do that. So anything they soak test would have to be ready for prime time. Which means it will have to apply over 893 or 901 for it to work on the people they sent 901 to.
Then that would mean that they would have to send two soak tests, one to the few who got .901 and one to the rest. Just curious.