Scenes are processed as you request them. Once they are processed they are available for immediate download by anyone. Check out the FAQs on the landsat site:

Scenes are processed as you request them. Once they are processed they are available for immediate download by anyone. Check out the FAQs on the landsat site: http://landsat.usgs.gov/search_and_order_Landsat_scenes.php http://landsat.usgs.gov/search_and_order_Landsat_scenes.php Also check out WELD. I don't think it has Landsat 8 data yet but it may meet your needs: http://landsat.usgs.gov/WELD.php http://landsat.usgs.gov/WELD.php