I could be wrong but I remember having signed for 12 months somewhere on my application or some other documents... but again I could be wrong.
Moving away directly after arrival is definately not a good idea, simply because it will probably cost you a lot of sleepless nights for years. You will never be safe as somebody who wants to get back at you, whether directly or general politics, can still try to get your status revoken for not having settled in Quebec at all.. I do not know how much that applies to citizenship, but even then I guess that some people could argue that having signed for settling in Quebec and then not doing so at all is a sort of falsified information provided in the application... Depending on the agent, the worst case scenario could be revocation of citizenship if you have a second one..
So simply settle in Quebec, Montreal is really not bad at all, for about a year, maybe you'll like it, maybe you won't but at least then you can live in psychological peace and dont have to worry about the immigration officers in black suits ;-)