I've read the topic about this secret question in the link you have provided in the first page but I'm just wondering why the description says different. Well I believe you now as there are several members who already tested it out.
Did you even read the link I posted? Or just the title?
The forum software (SMF) includes the Secret Question method of recovery by default. However, theymos disabled that option for security purposes due to the 2015 hack that leaked the Secret Questions and Answers of the users. He didn't change the page text (that says you can recover your acc with the Secret Question), but it doesn't matter.
[...] The reason that the accounts are locked is because the May 2015 hack leaked Bitcointalk's database which did not securely secure the Secret Question and Answer. To prevent people from guessing the answers, theymos made it so that accounts that are recovered using the secret question are automatically locked when the option is attempted. This is to prevent hackers who may be able to guess the answers from the leaked database. [...]