I just came back from a trip to Tokyo, and the way they run trains there is an eye opener. The JR trains running on multiple tracks in the middle of the city doing ~103km/h (via my phone’s gps) and whizzing by other trains on the track next to it is something I don't foresee us ever doing here, the trains there also fly into the stations but most have some type of platform doors.
Back in the spring when Metrolinx was still testing Finch, I was driving getting off the 400 and an LRV was flying down the tracks, Im guessing it was doing about 70-80km/h, it stopped at all the stations, I was driving slightly over the speed limit and I couldn't catch up to it. So they can definitely run this LRT much faster than what the TTC is planning.