I'd like André as well to address this.
I saw that mentioned in the evidence of earlier meetings here, and it was the first time I'd heard that suggestion. I don't know where it comes from. It certainly never happened in New Zealand or Scotland. I don't quite understand why. It does seem to me that our experience in Canada under the current system is that if we have a region where one party is strong, the system exaggerates that, while a proportional system would gives each party exactly what it deserves in each region.