It sounds like the latest theory from S&R is, 2 of the climbers chose to continue because the choice was either to continue or stay and die and Kelly James was too exhausted to continue.
As the other 2 continued they were blown off the mtn by the hurricane force winds and are buried under the new snow where they fell.
Does that sound right?
It sounds like they made a bad choice concerning weather and gear, and got slowed coming down the summit, for whatever reason.