Interesting discussion.
Perhaps the answer lies within an old, archieved thread, but does anyone know what percentage of the Montreal market Americans constitute? Perhaps someone affiliated with an agency or a SP could chime in to give us an idea. Given the fact that the majority of communication on here is in English and given the ease with which someone can transact with agencies and providers in English, the percentage has to be significant. If many customers weren't American, why on earth would agencies even bother to invest so much in English language websites, answer the phones in English, or denote the fact that their girls are bi-lingual? Yes, I know people in the rest of Canada speak English, but I also know that English speaking Canadians are more likely to be able to speak French than your average American hobbyist. I'm not implying that Americans are a majority by any means, but I do think we are an important segment of the market that has an impact on supply, demand, and pricing. I would lean more toward thinking that the underperforming dollar and America's economic malaise have contributed to prices holding and the prevalence of specials.
In my opinion, a local hobbyist lamenting American sex tourists is a lot like what you see in my home state: locals lamenting the presence of flatlanders during ski season. Like it or not, without the dollars the flatlanders infuse into our economy, my state would go belly-up.