I personally think that optimine and/or optifog should be built into minecraft. We all hate lag and most people don't like to spoil vanilla minecrafts. It should be part of vanilla minecraft. Seriously these mods help alot.
edit: Nevermind its a stupid idea because mods are sometimes uncompatible with certatin things and etc. Its kind of a big deal to add those
Redpower 2, Industrial Craft 2, Buildcraft, Forestry, Extra Bees, Logic Pipes, EnderChests, IronChests, Thermal Expansion, Teleport pipes, and the must have ComputerCraft
optimine and optifog i think are included in fast graphics. also, these are mods that are a bit more difficult to add, due to changing core mechanics of the game.
edit: Nevermind its a stupid idea because mods are sometimes uncompatible with certatin things and etc. Its kind of a big deal to add those
So I don't think so.