There is a good chance we will see the ICC buff increased to +30% this coming reset. It has been on a 4 week cycle, with the last increase happening on June 22. If it comes in as planned, then we should see more ICC progress for many guilds.
Although, such an increase may not have much of an effect on the guilds working on the Lich King heroic encounter - we have had only 100 guilds complete it on 25m mode since the last ICC buff. There are currently over 2,500 guilds
working on this fight.