Actually, just for the sake of closure (and I guess I should've thought of that yesterday), I'll suggest this:
1) Find me just ONE common forest characteristic shared by all of the following: Southeastern Manitoba, Thunder Bay, Huron County ON, Kingston, Montreal, Edmundston NB, Campbellton NB, Gaspé, but NOT present in Central NB / Fredericton.
or 2) shut up and agree with me.