I have smoked a fair number of different relatively young (2 to 3 years age at most)
Don Carlos, especially the 80th Aniversario Personal Reserve (my favorite and the best i have had in my opinion).
The younger ones had a much fuller richness, body, aroma and flavor.
This one was just milder, smoother and mellower and more muted in those areas.
I'm far from an expert on aged cigars, but I have been fortunate to have smoked probably 100 of all different marcas and vitolas, nc's and cc's, and this one just gave me the impression that it had passed its prime. I would guess they would be better in the 5 to 10 year range.
I have read the same conflicting information on aging too, and all i can say is to age or acquire some of different ages and find out for yourself, as i have had both good and bad aged cigars, all stored exactly the same way, so every cigar seems to really age differently.
I friggin love cigars