We have only seen 3 hours of TV out of this show but so far, the teenage son Josh has grown up considerably.
Maybe. Or maybe last week he was "un-characteristically" petulant so we can have the Father vs Son bit. So his character has only grown so much as he's not acting like he did last week.
A lot of his petulance for me hinges on the accuracy of his rebuke to his father about how if he hadn't fought the officers searching their house they "
may have only had to pay a fine."
It hasn't been followed-up on on the show, but that claim seems rather dubious to me considering the fascist-like tear the room apart three-man search of their home (implied to have happened before) and the fact that they weren't even going to let the family take their youngest child to Terra Nova when a) They didn't think the father would be going (so still a "family is four" situation), and b) there's no population explosion issue at Terra Nova.
If the kid is right about the fine being likely however, that does make his father look like an overreacting douche who got sent to prison for six years for assaulting cops over a fine-able offense that shouldn't have been a big deal given his wife was apparently fairly well-to-do financially according to Taylor. That's pretty irresponsible and would justify the kid's anger. It also seems to fit his other hotheaded behavior in the pilot episode.
So, that could go either way for me.