Ff, from my own readings, your about right on elven ages, though I've also read that they are 'physically' mature at about 40, and emotionally mature around 100. For a classic faerun example, Drizzt Du'Urden was only 70 when he left his family, and was already a powerful fighter, though in my opinion not yet fully emotionally mature.
I found where my group probably got the 110 number. http://www.d20srd.org/srd/description.htm#age
The SRD has age tables apparently; they say elven adulthood begins at 110 (vs 15 for humans!!), with 'middle age' at 175 (vs 35 for humans). That's about a 3.5 to 1 ratio between elves and humans in that range.
It also has rolled starting ages (i.e. 110 being the min), +4d6 or 6d6 or 10d6 for elves depending on class. (Not saying anyone should roll for age, just to give a sense of variability from elf to elf). For example the average starting age for a ranger would be 131 (+3x7 from the 6d6) and I made mine 134.
I would not be surprised if Drizzt were an outlier....my former bf's group loved to make fun of Drizzt, saying he was a Mary Sue and always too much of a superman / prodigy who got to break all the rules.
Considering he's so epic as an adult, it might stand to reason he was acting like an adult really early - don't they say Joan of Arc did her big stuff at age 13?
Maybe it's like others said - they physically mature at (closer to) parity with humans, but elven culture / mindset is just that they rarely go off and act like adults for awhile. Sort of like how in modern society, we basically treat people like kids until they graduate college at 22-23, but hundreds of years ago girls were getting married off and boys sent to war (so that the older men could marry their coeds =P) at like 15.
I personally am fine with anything (just don't want my char to be 'inconsistent', although most likely the chars won't be directly talking about ages anyway). I'm not saying we have to use the SRD, just that it's probably where my understanding indirectly came from. I just sort of enjoy thinking bout the world and the Forgotten Realms....a lot of what I love about fantasy is that sense of the wider world. What's that quote from Gandalf to Bilbo? "It is a wide wide world, and you are just a little fellow, after all."