Perhaps it wasnt a poor choice at the time they chose it? From what i read in other threads its sometimes peak hour based. Sounds like the line is way overloaded. Moving servers ,would be the easy way out. Consider that the cash-shop is supposed to be created to fund the move of chaos data center to europe, you can imagine the costs in moving the primal and (name escapes me) data center to US to be double that. Also who knows what the cost is for running a data center in montreal compared to a US city?
That combined could make a change of server location something that wouldnt be soon.
And wouldn't a move to US create problems for canadian players who would have to go through te same backbone?