No self respecting filght school in this situation is ever going to guarantee any amount of hours to anybody. It would be highly unprofessional and a complete lie.
I fully support contracts outlining the ratings to be received, costs, possible extras and all the other bits, but there are too many variables in the market for anybody to guarantee hours. There will, however, always be the caveat of acts of god, weather and all other things we can't control that gives companies an out if the punter doesn't get what they want.
With the EFT situation the main constraint on this is time with the restriction of only two years on the J1 visa. It is more than feesible to gain more than a 1000 hours instructing in 2 years in this part of the world, but there is still the possibility that somebody wouldn't do it. This puts the company in a difficult position and not many options to solve the issue of an under houred graduate of the APP (if they put an hours figure in writing that is).
So, for this very reason alone it is understandable in a business sense. As they won't put it in writing it says something about their integrity and that they are not trying to decieve anyone.
The best people to talk to are the current/past instructors who will all likely tell you they quite easily managed to build a significant (1000+) number of hours during their time at EFT.