CBA,
Sorry, I think I got the wrong end of what you were saying.
If you were asking whether 1000hrs fast jet would count towards the 2500hr requirement, fair question.
The answer is no at the moment but, as you point out, things can change.
That requirement seemed aimed squarely at the type of LOCO F/O who started on medium jets out of flight school, and now has a few years under his belt.