When there are only 4 people working on the game, updates don't come quickly. Unless you want tiny (and I mean tiny) updates. (I'm not saying anyone is slow or anything, I'm just laying out the facts)
Everyone is misunderstanding this classic thread. OP wanted to know "why DOESN'T it take a long time to release an update". I his opinion, any update should take much longer, due to the size of the team and other factors. Personally, I agree. Cool story, bro.