Yup, and they could use some help, which is why Courtney will help. People have said how bad she is at challenges. She might lack athelitic ability, but she makes up for it in desire to win. She would not put up with Justin's slacking off. Somebody needs to get the Grips head in the game.
I'll say this about Heather, while at times she is optonestic enough to get others to do her work for her. But more often than not, she will actully work hard. In season 1, when Heather did stuff like that it was to get a break, but for Justin he just doesn't work period. But compared to Justin, even Heather works hard compared to lazy Justin.