Even if the accounts are owned by two different people, I still believe that's a cheat.
I can't believe that Cryptohunterkill created a topic, CamilaStar saw the topic once it was posted and posted a reply within 3 minutes.
That didn't happen only once. It can happen only if they have planned it beforehand.
Exactly, It can never be a coincidence after all those times. It means it was either all planned or one person owns bother accounts. I could have my brother or sister join Bitcointalk forum, but I would not bother about pushing them to rank up or earn merits through shady ways, let alone get to know their usernames.
I think lovesmayfamilis' findings even give more reason to have the accounts tagged or banned.