Devs when you are planning to go on exchanges? Maybe you are already negotiating with some major exchange?
I think this is a premature question. Towards the end of ICO usually this information appears. And is largely dependent on the success of the project.
For any investor it is important that the tokens get on the exchange as quickly as possible. I know some good projects that roll into the pipe, because they can not get to the exchanges. People forget about such projects quickly.
Acorn will be on exchanges asap. They declarate it in their WP. Thats why I contribute.