What did I notice at first? Look at the spaces that make the letters as they fall. They get bigger. Why?
How about we start with a slightly simpler case. Suppose I build a water fountain that just releases two drops of water one after the other. Maybe the the second drop is released from the same point, but 0.2 seconds later. It seems to make sense that the two drops would stay 0.2 seconds apart. And they do.
Ok, to illustrate what is going on I have created a quick vpython simulation. Here you can see what that would look like.
