They climbed past us near our bivy site at 8,200' while we were lazily having another cup of coffee around 7 am. They climbed on, and then we caught up with them at the base of Long John Tower. We climbed up the gully below the tower, and they stayed back, trying to decide how they wanted to approach it, I think. We never saw them come over the notch (by the tower). However, we did see two climbers come through the notch, but it was different people. We talked to them at the West Ridge notch, and they said that the two women were still at the base of LJT when they climbed past them, although the two guys took a different route, so they didn't really interact with the women.
They were definitely equipped for overnight, and the weather was really nice Sunday night, plus there is still enough snow to melt. So if they stayed another night, they probably weren't suffering. (Barring injury, of course) But then, you say they're still missing?