The inter-individual variations in response patterns and levels are very noticeable which further precludes any generalization of results across subjects. The testing of swimmers who are on antibiotics or ill raises an ethical question. I am sure you are aware of the danger of antibiotics to the kidneys and liver when coupled with moderate to hard exercise. They have no reliability, no comparative value to other sets of data, and are confounded by heat acclimatization. The training programs seem to be mixed, that is, not enough repetitions of any particular swim were performed to stimulate meaningful changes.
Mixed training produces mixed results so it is no wonder that Australian sprinting is poor.
If what was trained is transferred to competitive situations, then competitive times will be slow for that is the pace that was practiced. Even in lactate sets the level of lactate of the last repetition was high while the pace that was experienced was usually much slower than one would want in a race. Preliminary to considering what can be learned from each test is testing in a manner so that something might be learned. I cannot see where that was done. You cannot tell anything from one test because there is no reliability of data.