It's funny, i've played every NFS ever made (owned most of them too) but i always get bored. I've been playing LFS now for almost 6 years, and i still find it engaging....That has to say something about the quality of LFS.
Hmm, they need to be taken round a track at 120mph (if they think this is slow compared to the 300mph they get in NFS), then they will see what being thrown around at high speed really feels like. Also being involved in some kind of crash might give them an idea, in NFS crashing at 70mph is more than routine, but in real life its must hurt a LOT if not cause injuries, that'll give them an idea what real speed is like
I had the same problem with my mate, until he had a ride in a Caterham Superlight R around Castle Coombe, he soon changed his mind about NFS being better
Lol I do kind of feel smug that I can turn a lap of a circuit in LFS without crashing when my mates would never be able to