All this discussion about the guys telling Emily about Kalon's comments brings these thoughts to mind:
24 hour passed between the time of Kalon's comments and Emily being informed of them. We must remember that a group date is filmed over the course of an entire day. By the time Doug spoke to Emily the group had probably spent 10-12 hours (or more) together. Emily has experienced both sides of the Bachelor/Bachelorette equation. She knows that the only forms of entertainment is drinking, sleeping, dating and talking. She probably expected that Kalon's comment was a point of discussion between the guys, something along the lines of "can you believe he said that?" It may have appeared that they were just finding out about Kalon on the group date, more than likely at least half if not more of them knew about the comment much earlier. Remember we only see the edited version. They showed us the lamest responses. Possibly, Emily had reason to believe that those she trusted and had a closer bond with (Arie) should have pulled her aside at some point in the 10-12 plus hours and mentioned the comment. These people have a lot of down time during filming of the dates. Although they are participating in the date there are multiple opportunities for them to talk/hang out while waiting for the filming portion to be staged. I too would have wondered why it took any of the men so much time to mention the comment. Then again, it could have been a production staged, series of events. It sure made for good TV.
Now that I've "over commented" on Kalon's exit, I love that Emily provided us with some very real moments. She has surprised me with how well she handles herself in emotionally charged situations. Bring on Croatia!