Here’s a good map. I think that you’ve got a point with Tufts, but this is a great illustration of BC’s true distance.
http://www.stonebrowndesign.com/uploads/9/7/6/9/9769402/t-time.jpg
All of the schools except Tufts are at or near the 15 min radius of said hub. With transfers that makes travel between in the 30 minute radius.
Meanwhile, BC (the far left of the graph) takes 40 minutes. Their line is by far the longest in length and stops, only competed with by Riverside.