Thanks lanfan,
That makes sense and goes with this blog entry form Unwrapping the Gifted:
Quote
Concerns include the effect on local school districts if their top students transferred to the program at Tech. Districts� financial support is based partly on the size of enrollment, and outstanding students often help to boost schools� composite scores on standardized tests.
http://blogs.edweek.org/teachers/unwrapping_the_gifted/2008/03/

Your statement surprised me because if schools are so interested in keeping their outstanding students, it would be reasonable to expect them to be responsive in meeting gifted learners' needs.
Quote
To expect reason is where the fallacy lies. ~Richard Russo