Daryl:
What Clayton said, but its not all about taste.
Sure, they like the fat, but the sad reality of our local indigenous mob on country is rampant gum disease. Quite simply, "bullocky" is a lot easier to chew than buffalo.
Once the liver and tongue have been removed from a field-shot buffalo, interest sometimes wanes as they look for a spot for the cooking fire, whereas a "redskin" will often be cut up till nothing remains.