I think you can just select them all and do "bounce to clips"? If you need to export them for some reason you could grab the bounced clips from the project audio folder.
Or in case you didn't know you can export as many tracks as you want in one go by selecting "tracks" as source category when you export. Provided you have selected everything you want to bounce (as per usual in Sonar).
FWIW I would be surprised if using ACIDized files increased the saving time by that much, do keep us updated.