Ice/Fire here - running CE and Iciciles in Brickstown. Crey Lts and bosses +3s doing a lot of running off, perhaps half the time even if I haven't done any damage yet. Tested on about 20 crowds and I would say half failed to contribute to teh alpha and simply fled.
SK'd up to fight Rikti level 46 and 47 in a door mish and they were a little better - probably more like one-quarter fleeing immediately.
Cheers