So went to Reapercon, CAV is going strong there, but I didn't play. Actually ended up mediating a lance on lance intro boxed set game (players was 3v3, Atlas, Zeus, Trebuchet, Spider (the most experienced player from each team ran the spider and trib each).
The CAV tourney was integrated into the con space this year instead of somewhere distant. They seemed to be doing well. There were still more CAVs in the paint contest than or BT, Warmahordes, entries. There was a large amount of 40k however.
I think what's keeping CAV down at this point is getting less exposure than us.