Hi guys.
I am wondering how secure the secure erase feature really is. I flashed my phone using the --erase-user-data=secure option but the whole process only took a few minutes. Is it any different from standard Windows quick formatting? Does it really make it impossible (or at least difficult) to recover erased data? An why did it only need such a short time to complete? The guide states that "it will take a very long time" but I've heared from other users that securely flashing their phones also took only a few minutes.

Cheers.