You must live in a small world as I have just rode major trunk/main lines using 10 minute as a start base, going to 15-20 at other times in Major cities. 2 had 3 cars 100' cars trains.I would. And did. I don't get how a rapid transit trunk line is allowed to have frequency that poor. Imagine you just miss the train, and then just miss your bus connection on the other end. 20 mins added to your trip. Routes like these should be at least 3-5 mins at peak, and 5-7 mins off-peak.
We in the GTA are lucky to see the service we have as the US Riders would love to see them compare to 15-90 minutes they see today, let alone service on Sunday.
Ridership dictates quality of service and what I have seen for KW, 7-10 is fine. Will have a look in Oct after a few months of school riding. To see less than 5 minutes is decades away when 3 car trains can't handle the ridership.