I believe so, but if I am ducking it with a compressor I am not getting quite the same duble effect. Even with filtering and stuff, still doesn't seem so subtle...
Delay is a lot lower in volume (obviously) and high- and low-pass filtered imo.
Additionally you could send the delayed signal in a reverb to make it even more 'washy' (is that a word? lol).
That should get you in the ballpark I think, otherwise maybe let us hear what you have so far so we could probably give more suggestions.