Hi Jeremy,
From my speed tests on my various machines, PM Plus can catalog anywhere between 7,000 to 25,000 images per hour. The speed of the drive with the image files will be one of the bottlenecks in this process. The location of the Catalog folder will also be another potential bottleneck. The catalog should be on a local drive, preferably an internal SSD. If the image files are on a NAS device, then this will also add time to the cataloging process. I have not done a comparison between our different NAS devices since each one seems to be significantly slower than an external HD or SSD. Where are your images files and Photo Mechanic Catalog located?
Best regards,
--Bob