My 2 cents,
During the 60's and 70's, all of the anointed were people who had become consecrated (the old term for dedicated) before 1935, in fact virtually all who came in before '35 believed they were going to heaven. This meant that nearly all of the anointed living at that time (the ones who did not leave in the 20's and 30's, aka the remnant) came from the areas of the world where most of the Bible Students pre-1935 had been concentrated. In those days it was mostly a white American religion. It is worth noting that many if not most of the Russellites in the 1800's had been believers in the teachings of William Miller or its offshoots. The Millerites had been concentrated in the American Northeast - very little presence in the American south. This was partly due to many of the prominent early Adventists were staunch abolitionists, and the anti-slavery rhetoric didn't go over very well in the South. The JWs continued to be a predominantly white religion until probably the 70's or 80's.
Nowadays, it is another matter, as virtually all of the anointed now date to after '35, including the WT leadership. If we had full demographics of the WT religion I think we would find that the majority of Witnesses; 1. reside outside the US, 2. are not English speakers, 3. are non-white. The original poster's question is a good one; why doesn't the JW leadership resemble the JW community in ethnicity? Does this not represent an inherent racism?
Also, I do recall looking at a 1920's JW yearbook once and was surprised to see a section about the work among 'our colored brethren' in the south. Of course it was segregated and they continued to have segregated congregations in the South into the 60's. Were not these ones in the 20's also anointed, and why didn't any of them ever find their way to WT leadership?