According to the RFP, these will be two independent centers, set up near Philly and Dallas. Seems like this is not planned to be done at any existing DOL center.
It could be that once PERM is in motion at DOL, they will turn over all the existing backlog to these two centers, which could mean that this backlog reduction will start in sync with PERM implementation (which everyone now knows is an eternal wait).
Another explanation given by my attorneys is that different officers at DOL have different levels of productivity (or motivation, professionalism, brains etc). So depending on which desk your application lands on, you may be approved earlier than usual. However, the official processing times reflect the earliest pending apps. Who knows what happens inside those walls!