Eh, when you say a salad in Europe, there's a 90-95% chance that its only dressing is olive oil (and not much of it, just for the texture) and not heavy stuff like ranch or french dressing.
Sure, but the rest of the stuff (in what I consider salad base - tomatoes, cucumbers, maybe peppers?) is really small so it doesn't matter. A greek salad has cheese, yeah, that's a high calorie input but you don't eat much of it