I would have been 11 when it was created so PRETTY MUCH. Joined about two years ago when I started college, which I expect is the case for a lot of people, considering how many screens I see in 100+ person lectures that have Reddit open.
Fun fact: I graduated college a few weeks before this came out. This was the hot phone that year. Yahoo was the search engine you used if you didn't know about Altavista.digital.com. "Wireless" was what the British called radio. eBay was that bullshit beanie baby site and when you wanted to pass a note in class, you wrote it on paper as texting didn't exist. There were no laptops in class (fun fact: students couldn't really afford color laptops until my junior year; the people I knew with laptops had monochrome) and anybody rawkin' an AOL email address was a hopeless newb, not an old-schooler.