Two problems with your logic Drumstyx. First BOTH of these collisions happened during hours of darkness, First one was approx 5 am, (sun doesn't rise this time of the year until almost 7), second one happened at 10:30 pm. In the latest one it wasn't "stop and go" traffic. The reports say "traffic had slowed to approx 60 km/h" when the trailing tractor trailer failed to slow.
So given the ACTUAL circumstances and not the ones you have presented would have made lane splitting VERY dangerous. CBCCanada posted you have to be nuts to split in the section, and you replied how people were actually making room for you to split... But it appears that was in town and not on the highway. I too travel this section from Thornhill to Oshawa on a regular basis. People in the "stop and go areas" DO change lanes all the time mostly without signalling as they know if they signal the person behind will speed up to "block" them from moving over.
Now your saying that splitting would have saved a rider as they wouldn't have been in that spot when the collision occured. That is a ridiculous statement. How can you say that, while splitting along, that wouldn't have seen that very rider just split pass that tractor trailer unit which failed to slow and therefore put the rider DIRECTLY in fornt of that rig, where they would have been the first fatality.
I get it, your 100% in favor of splitting and if you choose to do it bully for you, until the day comes that some cager takes offense and takes you out, or you end up here bitching about the s172 consequences. But please don't come here and fill new riders with the twisted logic that it is the safest thing for them to do and would save their lives. Anymore than having loudpipes while doing it will. Drivers in the GTA are just not of the calibre that lane splitting can be done safely without increasing the riders chances of crashing.
Why do I think lane splitting is unadvised? Because while riding my bike 18 months ago I was rear ended by a fool who thought he was Rossi in stop and go traffic on the 401. So you can use the "logic" that you have lane split without incident as evidence that it is safe, while I can use the fact that I was hit, (in my lane) by a lane splitter, as evidence that it is NOT safe.