Wrong. I cut out accounts that were less than 30 days old. There are a LOT of people who play for a few days and then disappear.
That will always occur: people try out the game for a day or two and figure out it's not for them, it's normal.
It would be a problem if the player count dropped at 2-3 months, this would mean people are initially interested in the game, take the time to actually play it, but actually drop after a few weeks out of disinterest.