I have to say that if you are really involved in forum live, take part in bounties and engage with people, then there will be no problem for you to write few quality posts in a day. Sometimes there will be even hard to find needed time to this because is really time consuming. I thought in begin that 1000 posts is a lot because my frequency was only 1,2 post per day but with time i get more involved and now this is 3 which makes me Legendary in spaan of a year. i think this is reasonable and short time compared to other forums where this is not possible at all.
Of course I'm talking about real quality on topic content and no spam at all. So taking all this into consideration, achieving Legendary rank on AltcoinsTalks forum is still very easy. Everybody who is complaining or thought that this is too much, has to reconsider his approach.