With the way they wrote, I severly doubt they were late starters/held back, etc. But I can't report them without a year or age anyway. And yes, people will lie, but a lot of them probably won't.
Looking at the stats, yea, a lot of people don't lie.
And writing isn't always a valid judgement, I found a "kewl lyke totally" person who'se a college student, at the same time, I know lots of older teenagers who type completly correctly.
Some of them mention their age in their journals. Most under-18's like to announce their birthdays, particularly when it they are turning 16 and can start driving.
