Obviously the article above is hostile to this movement, but I find it quite encouraging. This demonstrates that at least part of American Catholicism has gotten serious in the eternal war against heresy.
If your prospective Sunday School teachers don't agree with your teachings, OF COURSE you shouldn't allow them to teach, regardless of what Spirit they claim to be moved by.
For those who would like a little extra encouragement, let me relate something said recently by a Quaker woman who attends our church.
She said that she felt led towards promoting the education of boys AS boys, not like they were suboptimal versions of girls. My guess is whatever Spirit led her wasn't the same one the cafeteria Catholics were being led by.
In our church we've generally done quite well by our young men and boys. This is primarily the result of one thing: We don't hate them or wish that they were girls. Because of this, they keep showing up and bring their friends.