What does it mean? Not a lot. Evans was 2nd in the test RR and now Evans and Rogers are 1 and 2 in the test TT. Against good but not the best competition. As a result it shows little but as a test of how Beijing will cope with the road cycling events it's a step forward. The Aussies weer there to test the facilities and scope the course, so it's job done. It at least means they know the course more intimately than the likely top-flight competition.
CN reports here on the 23km TT.