Yes. And increasingly CBP has been merging US citizens into the same lines as APC-kiosk-using foreign visitors with an ESTA; and that is also too often making things much slower for US citizens than it used to be before APC kiosks were put in place.

When I am part of a US citizens-only travel party, I've increasingly been driven to adjust my US airports of entry where practical due to the slow-downs since APC was made available to many ESTA users too. More likely to adjust US airports of entry if the US airport doesn't have MPC or if MPC isn't reliably available to my travel party at the US airport of entry.

Even Global Entry lines can now sometimes be slow when the CBP feels like more extensively interacting with most every GE kiosk user at the time.

Regardless of GE, APC or MPC use, you can still be required to speak to CBP. As I again witnessed several hours ago for a long line of GE members too.