In reply to Simon Caldwell:
I'd say it's hard to grade. I think the parts I'd call Diff (i.e comparable with Diff on Tryfan or Stanage or the Roaches) are a section of the groove below the summit scramble of CG, then the step on the Imposter, then certainly the short wall above the Putting Green (arguably quite a lot harder) and then quite a lot of the final gully, I think, though my memory of that's a bit hazy. Also, I soloed the whole thing, in good form, so it's a bit hard to judge. As with all gabbro, it's quite hard to grade because the friction's so good. The stupendous scramble up the summit tower of Clach Glas would be about Hard Severe if it was polished limestone
PS. I'd say it's about the same standard, or a shade harder, than the classic 1000 ft 'Carrot Ridge' in the 12 Bens of Connemara, which no one would describe as a walk, though it has a lot of very easy climbing.
I don't mean the way rock climbers call climbs 'a walk' sometimes
I'm sure John and I called Petite Fleur on Craig Ddu once 'a walk' once because we found it so easy. Oh, and as someone's said above there's 3PS ... and, of course, there's always FB on Stanage
Post edited at 16:10