what success have the Canadians had with tidal electricity generation?

Answer 1

You're going to want to google "bay of Fundy" for the data for this one.

Here is a start:
http://www.canadianencyclopedia.ca/index.cfm?PgNm=TCE&Params=A1ARTA0008003

(and yes, the Bay of Fundy is a real place, not a place where some screaming religious zealot is)

Answer 2

There is an active one built by Nova Scotia Power as an experiment - it can be visited and they say it produces enough power for about 4500 homes.... it is talked about in this article:

http://www.travelandtransitions.com/stories_photos/evangeline_trail.htm

There has been recent talk of trying a new system in the Bay of Fundy.

Answer 3

20 MWe in Canada. not very much. Hydro electric and fossil fuel is still much less expensive. We have surprisingly few good places to try it out. It has been a notable failure in Saskatchewan