Yes, up until DP came out, a fainted Pokémon wouldn't evolve when it had reached the level it otherwise could evolve on, except by using a Rare Candy on it.
On one side, it's more logical this way, I guess: a fainted Pokémon might not possess the strength to evolve, or would be KOed.
On the other hand: it wouldn't have the strength to resist evolution, either. And it could seriously mess up your plans for timed evolutions, especially if you wanted it to learn a certain attack immediately after evolving and you don't have any Heart Scales or Mushrooms.
Anywho, welcome to TPM! SPAM = no, except on a sandwich.
And if you ever feel the need to add something to your post when nothing (EDIT: I mean no-one, lol) has replied yet, you can edit it. It won't bump your thread to the front page, but it will keep you from getting unwanted replies like "OMG you double posteth!!!11one". Just a friendly advice there, nf.