I'm not aware of the US mandating lines be resold at controlled costs dictated by the FCC, but I don't deal with consumer/eyeball networks so perhaps I'm missing something? From the frequent complaints I see about duopolies in most US networks, I'm quite skeptical of this.
In metro Vancouver, I'm able to purchase 1G VPLS fiber links for around $800/mo, and dark fiber in the $1000-$2000/mo range for the most part, with similar pricing in Calgary and Toronto. Quotes I've seen in Seattle and Los Angeles have been typically 3-6x that range.
I can purchase municipal dark fiber in Coquitlam or New Westminster (suburbs of Vancouver) for $400/mo, and I believe Montreal is $500/mo. I'm not aware of being able to buy metro dark fiber for anywhere near that anywhere in the US.