The Canada Line PPP has been very good and unless someone told you were riding a PPP you would never know the difference.
The frequency level is set by Translink and the stations and trains are always clean and comfortable. The stations are no Spadina Taj Mahal but they are pleasant, functional, and accessible with escalators and elevators.
As far as the Canada Line station being too small, they are. That, however, had NOTHING to do with the PPP arrangement and EVERYTHING to do with Campbell. He wanted a system of 15,000 pphpd and the cheapest stations known to man which meant making them small. The basic design of the stations, route, number of stations, technology were all determined before the line financing went to tender.
InTransitBC couldn't have cared less whether the stations were to be 20 meters or 200 meters as long as it was determined and they knew that ahead of time to reflect the fiancing options.
Vancouver's Evergreen Line is to be a PPP and the province is still determined to have it open by 2014 nut I think 2015 is more probable.