Heavy voice acting ruins the experience of character development for me, but I enjoy the occasional "I serve the Flaming Fist!".
Reading character lines is like a book, voice acting is like a movie - I prefer to envision my characters via their actions and the way the text reads - play the movie but read the characters.
I also read faster than people talk (most of us do), and while I love to immerse myself in RPG's, I don't do that by spending 3x the time waiting for dialog lines to be read by an actor.
Just a point, since Voice acting has been brought up.
Other than that, I 'voiced' my opinion that the delay is more the acceptable, we the players want massive D:OS success maybe even more than the developers.