iMessage!!!

i am so ****** about this imessage thing. Im using an internet with the computer everyday. Its not too fast not too slow. its just average. I can even download a new episode of my fav show in the computer with just an hour. I am also connected in wifi using my itouch 4th gen its also average. But when it comes to imessage. Its always too slow! it always stucked up in the end in the "sending" thing.. Why?!