Example here:
Filters collection unavailable on *some* versions of IE9
I've already deleted the comments that were moved, in response to a moderator flag from one of the chat participants asking that the comments be cleaned up; since not every comment was moved, I had to delete them individually.
The original comments can be seen here: https://chat.stackoverflow.com/rooms/2842/discussion-between-andy-e-and-matt. The first six comments (after the feed onebox) were part of the original question.
If the purpose of the "migrate to chat" option is to reduce comment noise, a cut/paste instead of a copy/paste would be a great way to further this goal.