On this one specific issue he has a point. Studies have shown that, all things being equal, people do prefer rail over buses. In Ottawa of course, all things are certainly not equal. The same principles apply in Canada. We're not fundamentally different from people in other countries.
Neither you nor him seem to understand that the question is not whether a train draws more people out of their cars than a bus operating at the same speed and frequency, but whether the same taxpayer amount spent to fund the operation of a rail service draws the same number of people out of their cars than if invested in expanding Intercity bus services.
Even if we assume that a train is twice as popular as a bus, the operating cost of every train-km is approximately ten times that of a bus-km. Now assume that the bus operates with a cost-recovery of 50% and you‘ll nead each of these twice as many riders to pay 9.5 times as much for their fare to match the subsidy need of the bus:
Bus
$50 ticket price
20 passengers (assumed ridership)
$1,000 total revenues
$2,000 operating costs [$1,000/50%]
$1,000 operating subsidy
Train
Operating cost: $20,000 (i.e. 10 times that of the bus)
Desired subsidy need: $1,000 (i.e. same as bus)
Required revenues: $19,000
Assumed ridership: 40 passengers (i.e. twice that of bus)
Required average fare: $475 (i.e. 9.5 times the bus fare)
Attempting to replace a subsidized intercity bus service with an even more subsidized rail service is insane…