I have the 2000 Les Cailloux and 2000 Guigal CdP. I am aware that some CdP's like Pegau and Beaucastel require cellaring, but I'm not sure about the above. Parker, in his wine guide, does not give guidance on these in the way he does on bordeaux (I think he contends that most Rhone wines except for Northern are ready-to-drink upon release).
Not to revisit the keep vs. drink debate in general, but I would like to know views on when to drink the Cailloux and Guigal and whether you have found (with the exception of Pegau and Beaucastel) that CdP actually improves with bottle age. Thanks !