Thanks to Chris W for your reply to my question re the length of the OES tour and thanks to jbaent for the extra info from the pics and scans.
I am from Sydney and I think part of the reason that the Australian leg did not meet expectations as expressed by Ed Bicknell above, was that they were comparing to the BIA tour which was an extreme success (eg 20 shows in Sydney) which could never be matched by another artist, even DS five years later. But they still managed to do 9 shows in 1991, which as Chris W pointed out was still more than most other artists would have done at the time. MK had said the DS experience in Australia in 1986 had been comparable to Beatlemania in some ways, but like Ed Bicknell later said about the OES tour in general, things had changed "The last tour was utter misery, Whatever the zeitgeist was that we had been part of, it had passed."
I attended the first Sydney '91 show and loved every minute of it (especially the new songs). Some interesting things I remember from that night:
At that time, there was some Musicians Union type ruling that any overseas touring act had to have a local Australian artists as an opening act. DS managed to get around this by having a small band playing quietly in the main bar area which meant that only DS played the main show without the distraction of a support band.
I also remember a funny thing with the audience that I haven't seen with any other show. As the audience on Alchemy is mixed very loud, the cheers, shouts, whistles, claps etc are a distinctive part of that record. For most of the songs played that night that had been on Alchemy, it seemed like parts of the audience were replicating these in exactly the same places and exactly the same way to match what had appeared on the album!