Ah - I didn't notice the other posting. This may also have been talked about in another post that I missed, but it would be a good idea to fill out an Iowa Acceleration Scale, which has many objective criteria to look at when determining whether a kid is a good skip candidate.
Although, from a quick glance at the scores, it looks like your son does fall in the GT range, and a skip can be a solution in a school that has no GT programming and also is not providing challenging enough material at grade level.
