He's not bad, he's just fucking around in the game generally. I'm sure if he was playing it seriously he would be better, but mostly he's just showing off the different vehicles and driving systems and the police response to crime and whatnot. I've had fun watching him just dick around in the game till he gets banned again.
Like right now, he's intentionally driving a plane around on the ground with the radio on.
Makes me laugh I dunno.
Maybe I've studied myself retarded.
added:
Anyway, the point is that he's intentionally avoiding story missions and just fucking around in the game, so it doesn't spoil anything important, but gives you a good idea how the game plays.