If there's one universally justifiable annoyance, it's Guy's sanguine reactions. It seems like Guy would go to hell and rave about how warm it was. The only thing Guy will admittedly bash is eggs; he just doesn't like 'em. But is Guy truly raving about the food, or is he subliminally telling you what he really thinks?
Some people think there's a Guy Code: tiny little ticks, words, and reactions to tell you what he really thinks. If Guy takes a big bite and immediately starts talking about the decor of the place, or the plates, or how tall the chef is, the dish is probably low-grade dog food. Occasionally, Guy will actually cook the meal for the chef in a different way than the chef did. He's essentially saying, "Do it this way." That's a dead giveaway it was awful. If the bite invokes a listing of the spices, it's probably a good idea that just doesn't taste good. It's almost like he's telling the viewer, "Use these but don't make it like this."
So if he really likes the dish? There are two stages of Guy nirvana. The first is an extra bite. If Guy only takes one bite, there's a good chance he didn't like the dish. If he takes two, you can guarantee it's a winner. Guy will suddenly start talking about how good he feels while eating the dish. If Guy takes it a step further, he gives "that look" — maybe asking the chef to hold and cuddle him — that's an award-winning dish. Guy will often openly proclaim that he wished he came up with a dish or will say he's "stealing" it. Those are the places you simply must try because that's the top of the Triple D mountain.