..............but you're not suggesting that they apply for any other than an M1/J1 primarily for flight training, are you?
No. Every time I have done any flight training it has been during a holiday. One year we went over for some hour building and fun flying, and becasue the weather was so crap ended up with an IR
(at less than 18 hours training per week, I was allowed under the B2 to complete the course).
Anyway, if the flight school applies for an M1, then get it, as it will no doubt save a bunch of hassle....and I will leave it at that