@Natsu You PM each other any extended conversation that involves a set number of people. So rather than posting 10 one liners across 3 pages, you converse in PM and combine the conversation into a single post in the IC when done.
Think about an RP like it's a play. If we get a cast of 20+ characters in this with 8 different scenes going simultaneously, it is going to get confusing. It's not an issue with intros or long posts, but when everyone starts throwing out individual paragraphs for a conversation it will be very confusing for anyone new trying to join.
It's not a problem right now because we have less than 2 pages of posts. But if we get into the 40+ page territory it will become difficult to read and check what occurred previously, ect.
EDIT: the other problem being getting ninja'd, like the post was XD
Of course, this is up to the full discretion of the player-base and the GM. I was just suggesting an idea due to the size of the player base and the difficulties involved with speed posting. :)