yes, and you can make it just as short as any other mobo.
1. Make sure you have the latest Promise drivers (I think they are 1.6 build25 available from ASUS website). If you are using ata100 spots, this will substantually decrease the post time from old drivers.
2. If you are not using ata100, then under windows control panel, system properties, device manager, SCSI controllers -disable the promise controller and there will be no delay for ata100 drives on post.