I never noticed any racial or economic partiality in all my years growing up in the the truth, but what I did start to notice was partiality against children of a solo mother in the truth who had an opposing husband. My mother was never really accepted by a few of the snooty sisters who were elders wives etc. And there is partiality against those who are not pulling their weight and performing properly, who aren't doing all the 'works' they should be, ie, attending every single meeting, answering up at least once at every meeting, and showing your face at field service at least every fortnite. These ones begin to be ostracised socially.
There are definite 'class distinctions' in the congregations, as Jesus told true christians not to have.