MoP: Banquet Buffs
Feasts in Mists of Pandaria vary by cooking specialisation (Way): Each dish gives +250 in the primary stat of the person eating, based on their class and role (or 375 Stamina for tanks). But if your primary stat is that associated with the Banquet's specialisation, you gain a 275 buff (415 Stamina for tanks). For example, a Warlock gains 275 Intelligence from Banquet of the Pot, since the Way of the Pot cooks Intellect food, but (bugs aside) 250 from other Banquets. Your choice of Way does matter!
For context, remember that Banquets no longer offer the best possible buff: Individual dishes, like Mogu Fish Stew, grant +300, but require 600 specialisation cooking skill and a lot of ingredients. So if having the best buff absolutely matters, you won't be eating Banquets anyway. (Thanks Sennari.)