I will also add that the second board also has a similar French Immersion effect and the concentration of spec ed kids in the English stream is also a dirty little secret there as well. It is most apparent the first year it starts (grade 1 in one case, grade 4 in the other) since FI rates start out really high (~75%) and then drop off as families opt out. The number of kids in it by grade 8 is down in the low 40's.

Francophone families generally choose a French school board so children that speak French and have spec ed needs are usually in a different board. Bilingual families can shop around the boards and pick the best fit for their situation.