It depends. There isn't really a set amount of time. Valve can take things almost immediately or they can wait a few months. A friend of mine sent in a model a year ago in TF2 and it was put in the game only just a few weeks ago... I also had a friend who made a halloween item the day before the update which got in.

So there really isn't any set answer.

=/

Hell, what do you think? Honestly.

My set is approved, or really need to treat the textures as some people say?

I honestly don't know. Valve is very unpredictable.

lol