Is Macgregor a particularly multicultural suburb?

I'd say "sort of", although based on my own observations from driving around the place for the past few years it's still more Anglo-European than anything else. At the risk of sounding like a bigoted profiler, I'll just take a guess here (and apologise to those offended by my labels, as I am just trying to be factual to answer the question):

50% Anglo-European
25% Indian/Pakistani
15% East Asian
5% Middle-Eastern
5% Other

As I said, a huge bigoted guess based on onlooking alone.