"He said his own group lost time before reaching the summit at 7 p.m. on Friday, because they did not have the right equipment. 'I think we arrived late on the summit of K2 because the technical equipment was low quality,' he was quoted as saying by the Italian news agency ANSA."
Hmmm, presumably they had crampons and ice axes, but perhaps not enough ascending devices for the fixed ropes in the Bottleneck, which were eventually severed by the serac collapse during/before their descent, when some extra ice screws and/or snow pickets would have been nice to have.