Random thoughts from riding transit in San Francisco:
It's cool that on Market St they run underground BART, Muni metro (underground streetcars/light rail), historic streetcars from around the world on surface (including TTC), and trolley buses & regular buses, all on the same street.
Trolley buses are great, as quiet as streetcars. Waaay quieter than normal buses.
Cable cars are fun to ride when hanging on outside up & down hill.
Muni Metro runs light rail vehicles in tunnel, on surface in mixed traffic and on private ROW (like our proposed surface LRTs). I didn't ride during rush hour, but they seem to perform pretty well. They also run them in multi-unit trains of 2.
BART has bike racks within the station itself.
Dwell time (time spent per stop) on all Muni vehicles were low since none of the vehicles during my time at SF, including BART, were nearly as crowded as any TTC vehicle, as well as POP with all door boarding.
Having said all that, my main take-away regarding Toronto is that I hope TTC buses & streetcars go POP soon, it was great using any door. Also, if capacity increases to meet demand, I can see that a less crowded system can mean more comfortable trips and less dwell time as well.