The group interviews are fucking waste of time, not only limited to Coles Myer, but all the other ones I've been to.
When I did my Coles Myer interview, there was this Indian guy in our group, just like the Asian guy as mentioned, wouldn't shut the fuck up. Whenever there is a opportunity, he opened his month, even though his thinking was very 'poor'. Later on, we found out he just arrived in Australia only a couple of weeks. He asked the recuitment lady about how to contact his referee, as they were all in India. The lady said something like 'Don't bother, we are not going to make the expansive international calls to contact them'.
I hope he didn't get the job at the end.