On the flip side. I feel quite intimidated when I go to some suburbs in Sydney where up to 90% of the people are immigrants or visitors from other countries. For example I was in Stratified recently one evening looking for a restaurant. There was many restaurants but not one we found was non Korean and just about every person we seen was Korean or Chinese, it was like all the Australians had left town. it was sad really.
Strathfield does have a higher Chinese population than Australian population by 9%. You might want to take a trip to the east like Bondi or Coogee. The British population is 6% higher than the Australian population. Sydney is notorious for segregation of communities, so yes its possible to feel overwhelmed by immigrants in certain areas, but its not going to be anything close to 90% immigrants