I think it is important that those who keep data on rust be encourged to do so.
I find rust scores useful. It is a good way to avoid rust buckets. Ignore a high susceptability score at one's peril, is my experience.
Besides different strains, however, there is the problem that some cultivars are not what they are sold as. I was first alerted to the problem of identity of two of my cultivars by the gross differences between my rust scores and that published. This is more noid x noid or (noid x noid) x (noid x noid).
