I somewhat agree, but I also think from some of the stories Greg has told Nick about making bombs and taking a joyride in Papa Olaf's car that Greg may have had a rebellious streak in him. He ovbiously did things that he kept from his mother and is outgoing and loved to try new things.
Can you imagine what his mom would have said if she'd known about the little joy ride? :lol: Just from Greg's description of his mother, I picture her as being a little like Freddy's mother on ICarly (only maybe not quite as wacky). :lol: