Originally Posted by
TribalistMeathead
ORD definitely has a separate line for US citizens, in the form of the line for the kiosks. That's the only method of clearing immigration and customs at ORD that I've used recently. There may also be a separate line for US citizens who opt not to use the kiosks, but I can't say for certain, because I haven't looked for it.
Same for IAD. Citizens go right for the APC kiosks, Global Entry goes farther right for their line, non-citizens go left to go through traditional lines. At least at the main terminal, I haven't a clue what the setup is at the midfield Immigration and Customs facility
What the OP is reporting doesn't seem to be factually accurate, unless he's somehow mistakenly going through the non-citizen line, or refusing to use the kiosks.