Based on a quick look at the charts, i think daily volume is up about 50%. There has not been a single day this year with volume below 100K, whereas with the previous contract the majority of days were below 100K. Market depth might be up as well buts its hardly noticeable, and definitely not double. ICE dropped their fee by 50%. But volume did not go up by 100%. So they are losing with this change. However if CME charge full wack and keep the smaller size, they will getting an extra 50% windfall over what there were expecting.