We adopted domestically, but otherwise our story is similar. My wife received one glower from an old guy in a grocery story. For all I know, he may have been glowering because our eldest child (also adopted) is Caucasian, and he might have thought that my wife was going from man to man.
She also had two black women in her 30s or so THANKING her (no thanks needed, we LIKE having children!). Both incidents happened in Rockford, which should have as much racial tension as any city by common folklore, given the lawsuits of the past.
Congrats on your success adoption experience.