Frank, it should also be noted that in R&C they talked about few creatures getting straight up immunities. Even elementals. The example of a fire elemental getting obliterated by a Red Dragon's breath weapon, et al.
DamnedChoir said:
For the people upset about the elemental and fey natures of so many new monsters
Actually, I for one welcome our Fey overlords.

Fey have always been the redheaded stepchild of the monster world, as far as D&D is concerned. They're getting a shot in the arm.
The problem before...was that there were so many monsters and creatures that were similar to each other, there were always at least 2 things that filled a niche. Big dumb club wielding humanoid, savage fangy humanoid that smashes things, underwater good humanoid (part fish), underwater bad humanoid (part fish). There are even DOZENS in some of these categories.
This is in part due to 1e (or the 0E or whatever). Basically things progressed like, you first fought goblins and kobolds, then you fought orcs (1 HD), then gnolls (2 HD) then Bugbears (3 HD...)
I'm pretty sure that Goblins/Hobgoblins/Bugbears are Goblinoids, while Orcs are something else entirely. Kobolds and Gnolls were related in 2e (I think). The creatures I think lack flavor actually are Harpies/Grimlocks/Troglodytes, really.
But while some of them fill eachother's niche, the important thing is to make them distinct. That's nice about what 4e is doing, with giving the various monster races powers related to make them stand apart (Gnolls get powers to make them act like a pack of hyena; goblins get powers allowing them to dodge out from around swords, et al).
A cohesive explanation that relates things together, and explains
where they came from is fine by me*. While I think they're pouring on the Elemental part a little thick, I don't necessarily have a problem with it. Demons once being corrupted elementals? That's fine, and a little inventive. Giants related to the elemental Titans? Hey, mythology at work, that's cool with me. Besides, we have Fire, Frost and Stone giants, why
not? The emphasis on planar critters (Mephits, para-elementals, etc etc), and tons of fire-based monsters in the various MMs, it's nothing new. Anyone remember that Golems are constructs animated with the spirits of Elementals?
*As long as I can implement any sort of fluff that I want (i.e. Paizo's fluff about Ogres or Goblins, for instance).