Not necessary. Consider the journey b4 the bus stop. If
according to your theory, the bus behind, let's say it overtakes
and end up as the first bus behind, so taking the first bus may be
slower, as he may want to help his colleague out by slowing down a
bit. Don't forget that the first bus at ur bus stop is ahead of his
timetable, so he have to slow down somewhere cos he have to enter
the interchange on schedule. Same goes for the last one, but I will
agree with u to take the last one, bus is much riskier cos he may
not stop seeing there were 2 buses in front , esp since he is in a
rush. Also, SBST seems to have a policy that prevents buses from
bunching, so they will try to spread out, like 74.