Earlier quoted context omitted.
Only if you want to have a single partition :( If you want to have separate ones you have to do manual dance around luks. I'd wish it was easier to set up for multiple partitions.
Use a single partition as an lvm physical volume. Then you can have as many partitions in that as you want. This is what the Debian installer does by default if you select disk encryption.
Its been a while since I used Debian - need to check that out. In ubuntu currently when you select FDE it partitions things on its own. If you want separate /home you need to create LVM layout by hand before you start the installer an update grub/crypt setup after install is done.