It's true that it's more difficult to remove certain articles of clothing, but that doesn't make rape impossible, so yes, the jury was wrong.
It's quite mad that a jury, with all the time available to examine all the evidence, still reached this conclusion. I read more about this case in the Australian papers, and all the evidence the media relates would suggest that this is the mildest defence ever made by an alleged rapist.
There was no reason to base the idea that he could or couldn't rape on the basis of what the victim was wearing. The act could have occurred regardless, one way or another, so they should have based their decision on other evidence, if there were any. If not, he should have been acquitted anyway; you can't accuse someone of rape without evidence and expect the courts to punish them, that would be unfair and highly exploitable to those seeking to make money out of court cases.
I'm unimpressed with my country's court system in this case. But juries have always been a bit of a flawed attempt at justice due to the lack of professional ability in most jurors to examine a case, even if they are superior as a system to giving all power of condemnation to the judges.
What would be more interesting than our current vox populi approach to juries in Australia would be a kind of random selection which funds random public people to learn about law and study court cases, then gives those chosen who agree to the training "jury rights" to stand for that role. This would cut out uninterested and unintelligent citizens, but would still be random enough to be representational to the public. It would massively improve the court system. Too bad it is probably too costly to be considered.