I may be reading this wrong, but the way I'm reading that brochure it says that when your purchase the DDP, the price of the gratuity is not included in the purchase price..........it doesn't say that you won't be presented with some type of statement/reciept at the end of the meal upon which you may leave a tip. It also doesn't say that whatever statement/reciept they give you can't say 'this is what the 18% gratuity is'.
This will not affect our decisions regarding eating at Disney, as we already tip 15-20% on the non-discounted bill. I do have some concerns that the automatic addition of the gratuity will contribute to server apathy. And we will, as others have stated, take the few minutes to notify the manager of any poor service recieved/request a gratuity adjustment if we feel that it is warranted.