Exactly the point I wanted to make: people who might ride the rails might very well not take the bus for practical reasons and cultural, irrational reasons:
Practical: the bus uses all the same, congested infrastructure as you would use with your car, but it has the extra annoyance of not beginning or ending exactly where you'd like it to as well as stopping along the way. Rail, on the other hand, has its own, dedicated infrastructure, so it can be more reliable and, in most cases, faster than a commuter bus.
Emotional/Irrational: As things are, there's less 'stigma' associated with rail infrastructure than with buses. I hate it when people tell me that they'd never take a bus, but that they would take a train because, in my opinion, a seat is a seat. But it just is the way things are: many a paper has shown that, given the option, more people will take rail than a bus even if it isn't any faster -
34% to 43% in fact if the service is equivalent. And in this case, we can assume that not needing to go through 417 or 416 traffic will make it more than equivalent.
Bonus! Development: Though I don't have any studies off-hand to quote, I do know that rail, if well-done (i.e: not surrounded by seas of parking in god-forsaken areas) structures development much better than regular buses do (and it's hard to justify building BRT through these small communities). Towns like Richmond, Casselman and Carp might be small now, but we live in a reality of urban growth here in Canada and they will grow along with us. Without rail infrastructure to condense and concentrate that development, it will sprawl in subdivisions built around the automobile.
Just as it's wiser to provide the trellis before the vines grown, it's better to provide structuring elements before the development happens.
And plus, the rails are there. All you need are a handful of Talent-type DMU trains, some basic platforms and coordination with VIA and CN and bob's your uncle. In this day and age (am I old enough to be able to say that?) of high wages and work standards, it's often hard to justify the cost of building new rails, but these are ours for the taking. So let's.