I'm not sure those stats tell us much as the top teams (similar populations) have also had good starts to the season
Many away teams' fans will have been in the lower leagues for quite some time.
It seems only natural that they would want to visit a team like us who has been relatively successful for a number of years with good facilities and a new venue for them.
As has been mentioned, a team winning games and more importantly playing well, is bound to bring the crowds in no matter what division they play in.
Long may it continue.