The article hints at lack of qualifications but only points to potential inability to converse during an interview.  Huh.  My daughter is in French immersion and while some of her teachers have been highly qualified, it appears that many are hired merely for fluency.  Very few of them have had more than rudimentary English skills; one accused her of forging a letter from me with no proof or evidence, and when she asked for extra help on one of her assignments, the response was to figure it out for herself.

Boards are so desperate to offer the illusion of a superior education in French that they are scraping the bottom of the barrel for instructors.  Meanwhile, English programs, faced with declining enrolment, are underfunded....and attract children with either lower abilities or behavioural problems that can't cope with  the demands of a second language.

Immersion is a noble experiment that has largely failed.