doing so seems to have been a huge success, recent research suggests that coinjoins are now a pretty substantial chunk of the activity on the network.
Is this research published anywhere?
http://fc15.ifca.ai/preproceedings/bitcoin/paper_5.pdf
But.. Hm. Her slides for this had usage figures that don't appear to be in the paper, I'll see if I can find them.
EDIT:
Found the method used to detect coinjoin txs:
Quote
We defined this pattern as any transaction having more than five inputs and more than five outputs, and looked at how many transactions matched this pattern (which is admittedly only roughly correlated with coinjoins, but as coinjoins are indistinguishable from other transactions we cannot do better than an approximation).
TBH, that sounds like a terrible heuristic to detect coinjoin txs 