So Leicester and Northampton are the most popular rugby teams in England?
It's tough to tell, and depends on what you mean by "popular".
Do you mean people who attend club matches? In which case, are you judging it by the size of the crowd, or the proportion of seats sold? Are you including 1-off matches at bigger stadia?
Do you mean people who support the club? Buy replica kits? Turn up occasionally? Watch on TV?
Do you mean popular amongst rugby fans? So fans of other clubs who have a 2nd team? Or a preference when watching as a neutral?
My gut feeling is that Bath, Leicester, Northampton and Gloucester are the best supported clubs.
My gut feeling is that Northampton, Bath, Harlequins and Bristol (depending on which half of the year) are this year's "good guys" with the most neutral support.
Leicester get the biggest crowds... and have the 2nd biggest stadium.
Bath sell the biggest proportion of seats... and a stadium approximately half the capacity of Leicester or Bristol.
Exeter used to be "everyone's" 2nd team, but kinda lost that through racist chants and conspiracy theories.