Heck no. One of the reasons I love the DDP, because I don't even have to look at prices, so I usually don't.
I really don't get the DDP hate here. I like the DDP because once I've paid for it, I'm done. I can relax and enjoy my vacation without worrying about cost. Without the DDP, my husband would try to talk me into quick service places for dinner every night or he'd agree to table service and then order the cheapest thing. So the DDP just makes our trip much easier and more enjoyable.
I order what I want. Sometimes when I look at a menu I might hesitate against an entree because of the price, but on the dining plan I can order anything and not worry about it. I normally do a fish or vegetarian dish, so I normally pick the veggie dish because of the price. On the dining plan I might skip the veggies because the extra $15 for an entree isn't swaying my opinion.