I've officially found the life-span for Draenei.

http://www.wowwiki.com/Life_spans

Look to the "Immortal" section, it doesn't say they're adult-hood or child-hood limits but they never die.
Now i've got to re-make my char.. -_____-'

Well Ado.. I always went for the Immortal hook. But don't be afraid of it at all.

It is simply not known. Wowwiki isn't reliable and it doesn't show a source for their claims of true immortality. We simply don't know if they are immortal or just very long living.

Ancient Egyptians used to believe crocodiles were immortal: This was only because they lived longer then a human. So they may practically be immortal because they live so much longer, who knows what true immortality is?

WoWWiki's pretty accurate, and coming to that it's funded and made my Blizzard itself.

http://forums.wow-europe.com/thread.html?topicId=12025405153&sid=1
Now I know this link is about elfs, but Draenei and elven players seem to have problems when it comes to age, which Is why i thought this thread was good at clarifiying points such as maturity Vs pyshical age and its worth a read me thinks

This topic is a very interesting read about the duration of childhood & adolescense and I was following it. However it is not to taken for serious - of course you can draw some inspiration from it, but in the end it all comes down to this:

Rakkan wrote:

Perforad wrote:
It is simply not known.

The best thing to handle the aging question is to be flexible and also willing to overlook if there are some minor conflicts between different player's versions of age, as at the end of the day - until Blizzard supplies us with some proper defintite lore, age is a matter of interpretation.

For example, we have a handful of players who play very old Draenei with origins on Argus.
Sena and Karida for example play their Draenei as 'ageless' with no visible signs of aging showing that they are exceptionally old
Adonter plays his char with clear signs of being old.

I find both versions acceptable and have no issue playing along with each players version.

You are as old as you feel, I'd say. We know for a fact that a Draenei can be over 25.000 years and still vigorous.