Sorry, I wasn’t sure if I missed part of this thread along with the original question…
If it’s just my opinion of the objects that is wanted then I would say they are "great" –
I haven’t been able to replicate that sound with MSP(not quite).
Here is what Edmund Eagan said about it. He is using them with Kyma
The crossfilter is a sound algorhythym that was introduced in Kyma some time ago by Pete Johnston. It’s essentially the same basic idea as a convolution reverb, except that the analysis input can be constantly resampled much like the normal audio input is. This allows one to create to interesting, evolving loops which can sound very intoxicating, and can just as easily spin completely out of control! I typically use it in a fashion that feeds the original source material back into the analysis input at varying pitches and/or delays.