I was up there that day with a big Mounties' avalanche class. We had dug a rutschblock and it failed on 2, but there was a fair amount of uncertainty about how we should interpret this- the failure was just the 6 or 8 inches of unconsolidated soft upper snow sliding over the hard rain crust below. Once that had sloughed off we got back on the block and wailed on it, and could not get that to fail. One of the instructors said he would probably still be willing to ski a slope under these conditions, since the unstable layer was so unconsolidated, and our tests didn't show failures propagating anywhere. He thought an avalanche would be mostly a point-release type of situation, and without a lot of momentum. Sounds like your experience sort of backs that up?