Tinstaafl
Not all the students make it all the way to CPL ME.
Not all of students go for CFI/CFII/MEI
On the other hand, Aviator have a lot of JAA students. Which dont speak spanish.
TS is from Argentina, so he would have good chances of getting a FAA CFI job.
I think bottom line of that discussion is how good you are. If you are smart guy, with good skills and knowledge, that worked hard, have passion for aviation/instructing - you will be able to land a job.
Out of my experience, only about 10-20% of guys meet that criteria in flight schools.