Direct line, no "garden hose" effect, much lower ping (network delay) and packet loss compared to cable/DSL... that all adds up to a faster connection in real-life tests. There's a reason why data centers don't use cable/DSL. Of course, for the typical home user, the benefits of T1/T3 don't outweigh the costs. For mission essential applications, T1 and T3 are the way to go.
Of course, you realize this was all in jest - hence the winking smiley, right?
And I did misrepresent the facts - I should not have said bandwidth, since cable has a much higher bandwidth than a T1 or T3. And in today's tech savvy world, a T1 is basically a waste (except for slow cable internet subscribers like me) - but hey, I live in the past! Token-ring all the way, baby!