I actually like geoff& Tisha in the way that they are entertaining. I mean, walking around blowing a whistle and thinking that would actually help getting people to help you. Please.
I don't think the beauty queens behaviour is ouf of bad will, they just never backpacked before and it's their job to look pretty, so I can understand why she'd say that being filthy is the worst form of being. Obviously cocky, but understandable from her point of view.
Episode 2 also made clear why it's the "hardest race" ever. Not because its legs are long, but because the producers put pointless challenges in, the only aim being to hurt the candidates, i.e. the paintball challenge. They could've at least supplied the racers with paintguns themselves so that they'd could fight back and make that a challenge (Contestants must shoot at least 1 enemy before receiving their clue).
It somehow sounded a bit strange to me that many teams were complaining about lack of sleep and the leg going on for so long. It was only going so long because they either spent the night at the airport or spent the night waiting for the flowershop to open. Waiting for such things is common and has basically happened in just about every season (otherwise known as bunching). While I agree that sleeping in the airport might not do for refreshment as much as sleeping in a hotel, I have a hard time determining from the episode where the "30 hours without sleep" come from. Not saying it's a walk in the park, but I'm fairly sure with tighter editing they easily could've squeezed the leg in the usual 45mins (but then, they needed to show all teams playing a mobile phone game for a prolonged period of time for obvious reasons, so maybe not).