ATA Secure Erase is too fast

ATA Secure Erase is too fast

I have two SSDs in my laptop. one is SATA 500GB and the other is M.2 SATA 250 GB. I used the following steps for both to securly erase them so that I can sell the laptop:

1. unfreeze the drives: sudo systemctl suspend
2. Set a User Password: hdparm --user-master u --security-set-pass mypass /dev/sdx
3. Issue the ATA Secure Erase command: time hdparm --user-master u --security-erase mypass /dev/sdx

I have 3 questions

1. It is completed too fast in less than 3 seconds. Is it normal?
2. Does the length of mypass matters?
3. Whats is the advantage of using --security-erase-enhanced instead of --security-erase