From this article, it sounds like they have a very specialized GPU-accelerated brute force mechanism for local database backups? Assuming they have something l

From this article, it sounds like they have a very specialized GPU-accelerated brute force mechanism for local database backups? Assuming they have something like rainbow tables for short passwords on all of these managers, it still seems like it would take a very long time to correctly guess longer master passwords (say 20+ characters). No?