Lots of thoughts about differentiation on this thread... reminded me of this old post. To express this information in the format of tips for schools:

Another tip may be to describe plainly, with transparency and accountability, what a child will receive in terms of gifted programming, content, and delivery. When describing "gifted programming", do not attempt to mask any lack of an appropriate level of teaching, curriculum, or services by using buzzwords. To manage expectations, openly provide details such as Who, What, Where, When, Why, and How (the 5Ws).

Another tip may be: Don't be surprised if few gifted students are pleased with receiving differentiated task demands rather than instruction with more depth/breadth and/or at an accelerated/compacted pace, grouped with intellectual/academic peers.