I also sampled Encre Noire today for the first time. I accidentally over-applied since my atomizer wasn't working correctly, and it was entirely too strong on me. With that said, I totally get the dark, smokey, clean-earthen experience that was described for this fragrance.
On its own, I like the fragrance very much, but on my skin it wasn't giving me the excitement that I was hoping for. While I'm by no means a fragrance expert, I don't feel like the scent was very "old". The vetiver seems to cut through enough with its green freshness to keep it from being too dark. While I don't believe age matters in fragrance choice, if I had to put it into an age group from what I experienced, I'd probably put it around 28-37.
If you really enjoy it, wear it for yourself. You can't go wrong that way.