its more about trying to figure out why what is reported happening, happened than trying to figure out if what was reported was BS or not... i dont know if there really are shooting cracks or what up there but if there were things could have settled down quite a bit in a few hours time... they were up there Monday? (Alp A correct me if Im wrong here) and it had only been warm for a day up there***, and its possible that, ice layers or whatever in the snowpack were preventing water from penetrating all the way down and a lower weak layer existed. the only way we'd really know was if they dug a pit which it sounds like they didnt do...
personally i think propagating cracks are a good excuse to go home and have a beer, then again i have never seen one cause i only go out when avvy hazard is LOW, other than that its cragging weather.
***edited I just looked at it they were up on Wednesday I dunno what the hell they saw or why it occurred and i will shut up and play tetris.