Did you notice at the beginning of the episode, they called the frat boys "Team Superbad"?
If by "challenges", you mean "reading the instructions", then yeah, they made a mess of that particular challenge, but I suspect that every episode is going to use that challenge. Seems to me that they were otherwise fine, but their wasted time in both cases was after what was supposed to be the challenge, looking for a container and then their cab (probably the cameraman told him to wait anyway?).
I can't believe what a whiner Terrence is. I'm sure it hurt when his head got hit, but his reactions were very odd, almost like a little kid.
And how about the plane ticket thing. Are you aware that Tina got the airline to get a larger plane? Not sure what happened behind the scenes on that one, maybe she really did, but I think that making sure everyone knows it isn't going to get anyone to feel like they owe you a favor and might actually make them think you are an idiot, especially if you then insist on being the first ones through the door because you booked your ticket first.
And, to be consistent, Mark and Bill did get that last puzzle first and Tina wouldn't have solved it nearly as soon as she did had they not told her how they were going to do it, so by her own reasoning, shouldn't they have let Mark and Bill on the mat first? I have to say, though, I was impressed by his comment (not sure which is Mark and which is Bill), graciously saying that missing out on the round prize was worth it if it helps them strengthen their marriage.
That's another one that gets me, though. Why do so many people come on this race to try to patch things up or to figure out if they should keep going? Don't people realize how stressful this thing is? Why is it that they only feel like they should be together still if they are winning? Anthony and Stephanie were even wierder, though. "We really want to be together, but we need the winnings from the race to do so." I know life is expensive, but how does the rest of the world manage?