I do not know if it was temporary, region-specific, or what, but looking with an address out here in MD, prices are unchanged. However, they were (temporarily) different last night. Additionally, they seem to currently have a bug where depending on the number of PWs added, the state incentives sometimes appear and sometimes don't. So they are definitely doing something. When I looked last night, PW prices (bundled with solar) had also decreased, but that too is gone.
I think Tesla is usually pretty good about giving customers the option to proceed with the better of the old or new pricing, so hopefully they will continue that practice.