Dwarf Cluster has a different aroma to the ordinary Australian Cluster. They're both early varieties and both have compact cones. They look like different varieties, but some of the similarities between the two suggest that they may be the same variety, one of which is a tetraploid.
I think the problem with Yob is that he has decided that the Dwarf Cluster is retarded by disease or something - a decision he has made based on no ability to prove his decision, and then gone on to state it as an absolute fact. I've seen no evidence that it is diseased and noted a number of characteristics that indicate it may be a tetraploid. Besides, if it were simply stunted due to disease I doubt I'd be seeing the level of morphological difference between the Dwarf and Australian Cluster varieties.
For the record, 2 x 4 year old crowns of Dwarf Cluster produced just over 5 kg of rhizome. As I told Stu, you can bury bine at the start of the season and it will turn into rhizome. If you want millions of plants, tissue culture is a well established method of propagation in the commercial hop industry.