post #330 and #334 in that thread seems to sum it up, it seems like it was locked for a reason, and you've decided to reopen it here...
Midway in that thread is a discussion about the possible source of the OP's loss of traction issues, a cooked viscous coupler, but he would not know anything about that given how he kept testing it to see how much it failed...
I have a 5 speed AWD Impreza with VDC.
I have driven it into and out of snow banks and through parking lots flush with snow.
I have drifted a little, while hearing the car try to make me stop.
The traction seems steller, and the car is an absolute tank in the snow with snow tires on it. Better than any other car I have driven, and I have a little experience driving in the snow (30 years), though I am not in Quebec.
Sorry I cannot take your post at face value, I'm gonna side with the thousands of Subaru owners who are willfully ignorant while they drive their viscous coupler equipped 5 speed Subarus down the snowy roads of the world.