In reply to Misha: So what everyone seems to be agreeing is that the Alpine grading system has been left behind by events, and is now pretty archaic and misleading.
It is all very well saying "if you ask around a bit you will get the gen and find out what the real difficulty is, but that is like old-style UK guidebooks (yes, Swanage, I am looking at you!), where everyone knew certain routes were drastically undergraded but if you asked a few of the wise, they would drop you dark hints.
It kind of takes away the point of a grading system and guidebook, which is supposed to provide information, not conceal it. Alpine grading really needs a new grading system, but I doubt if it will get a generally agreed one.
For what it is worth, I think D+ is about right for the Frendo, but the TR North face is D- at most, while the Ryan Lochmatter on the Plan is easily TD-.