The same people that go to theme parks go to zoos and get half of the message in most cases that Tiger Island delivers. Years ago there was a study conducted that revealed that visitors to Dreamworld's Tiger Island spent between 15-20 minutes looking at the tigers as well as listening to the handlers. The same research done at Western Plains zoo found that the average watching the tigers there was approximately two minutes.
While I agree with some of your coments ptig, there's holes a mile wide in the one quoted above. I'd be guessing (probably correctly) that the majority of people that go to Dreamworld go for the rides, and the theme park entertainment. Amongst all the rides, there's the tiger display, and tucked away in the corner, a small native wildlife park. It's quite likely that Dreamworld visitors are going to spend far more time at your tiger exhibit than visitors do at the one at Western Plains Zoo - they are giving 20 minutes of their whole day to have a look at one of the few "non-ride" activities at Dreamworld. But Western Plains Zoo visitors in contrast, have gone to spend the best part of their day at a zoo, and not at a theme park.
Although I don't have any facts (and I'd be very keen to be pointed in the direction of the research that you are quoting) I would be surprised if Western Plains visitors spent only 2 minutes in front of the tigers there. I wouldn't dispute that fact that they spend less time in front of the tigers there than visitors do at Dreamworld, but in contrast, they spend the rest of their day looking at other animals, and not on activities that have nothing whatsoever to do with wildlife.
Overal, Western Plains visitors probably spend 4-5 hours watching animals in a day, but at Dreamworld, as you say, it's probably 15-20 minutes out of a day. Which visitors are likely to learn more about wildlife and conservation?
I'm also aware of the significant amount of money that Dreamworld contributes to various
in situ wildlife projects, but I'd be keen to see what percentage of their profits this constitutes. The National Zoo in Canberra (and other zoos) also donate a significant amount of money to
in situ conservation projects, and while the dollar value they donate might not be as large as Dreamworld's, I bet the percentage of it's income that this represents is much higher than Dreamworld's. In my eyes this shows a higher commitment to conservation.