Re: Pass the salt...
No, we haven't really been using that. The entire research activity that produced this paper (and the more expansive paper currently under conference consideration and peer review) has mostly been centered around matching with Troy Hunt's breach corpus and the NIST "match-against-bad-passwords" guideline.
We'll definitely consider looking into having that included in the design of follow-up experiments.
I'm very glad this Register article attracted a fellow security researcher. I hope reading the paper itself gave you some new insights into your own job, as your comment here has given us an interesting thing to consider for our future ones! [science++]