I guess it depends on the weather and conditions under foot but yes if there's snow and ice about in abundance then Orocs are the shoe I think. I have used ice axe and crampons in the peak, walkers have been avalanched and walked over cornices in the peak
but I'd say 98% of the time in the peak you wouldn't need them(IA&Cs that is)
2 years ago Tankys had lots of ice and I did it fell shoes, a few peopleslipped but not lots. The HPM in 2010 had lots of snow, some did it in Orocs but I did it in Mudclaws.
the one thing I would say about the oroc340's? is they are quite heavy