I don't think it is JUST LFS that attracts younger gamers (note "gamers" -- the majority of them are younger than 18 years old)... Almost every other game that is in the main market are under a popular category and no doubt attract the youngest of gamers. Matter of fact... I have noticed that PC gaming is becoming much more common for younger people. In the late 90's you didn't see a 12 year old playing an advanced simulation...
and playing it well. The fact is, many younger players are around these days, on PC, console, whatever... It is much more accessible and possible for people of any age. And in LFS' case, this game can be played by even a 5 or 6 year old computer system, which is maybe one reason why you get a lot of mixed ages... not a lot of people can upgrade either, so LFS is their only hope.
I do see people playing other simulations, young ones too... but they lack the interest in games like those... it doesn't 'look pretty', it is 'too hard' for them, etc. LFS is still a hard game for any youngster I think, but I still think it appeals to them because it is fun, like any game should be. That... and they probably are in belief with how the car drives... something they cannot do in real-life probably until they are 16 or older.
I find that a game that has a lot of 'young appeal' is somewhat of an advantage... for the developers to make more money at least. How do you think EA makes so much? You don't see EA making an incredibly hard game. The age group of around 12 to 16 buy the most games! So expect to see it... and those age groups primarily are sucked into GOOD
ONLINE GAMES, which is the most popular detail of any video game these days. Almost a requirement that a game has multiplayer these days.
That's all I gotta say
On a side note about age, and youngsters becoming very smart & good at games these days... a recent example of this has been my younger cousin. He is
8 years old and plays Counterstrike really REALLY damn good... No pro, but he finishes his games with a 2:1 k/d ratio