Indeed it's racist and prejudiced to say so, but let's be honest. Have you ever flown QR? Always Asian crew onboard, compared to EK and EY where you will have a mixture of all nationalities (a huge amount of Westerners).
And, they only employ white crew from Eastern Europe because they are pretty much similar to the people from Asia. They are there for the money and it looks good for QR to also have white crew onboard. But, when was the last time you actually met any Australian, British, French or German crew on QR flight?
Also prepare for those going to QR to sign a two year bond! Also heard they have introduced a new contract for "certain nationalities" that include that you have to be home every day at a certain hour, no partying etc...