To my knowledge, there's no retention problem. A lot of effort is being made. However, integration may be one of our biggest challenges. Earlier you mentioned access to French-language schools. In Ontario, there are admissions committees as a result of the issue of rights holders, which is related to section 23 of the Canadian Charter of Rights and Freedoms. Ontario is making a planned effort to integrate francophone immigrants in francophone schools. There are 12 francophone school boards in Ontario, and each of them has its own admissions committee. These admissions committees are governed by policies of our Ministry of Education. Their deliberate aim is to encourage these school boards to admit immigrants from francophone immigrant families.
On May 13th, 2010. See this statement in context.