You asked how our skip/acceleration went-- DShad just 9 weeks in 2nd grade math this year, and his skip to second takes place next year. The math went fabulously. The key to the success was that the receiving teacher adored him, and everyone was supportive of it. While DS bombed the speed tests, he didn't make any mistakes. We'll be deciding where he'll go after the end of the first quarter next year.
We also had achievement testing to help push things. I don't know how they compare with MAP scores. While DS' scores were a "once in a career" type scores for the principal, the school initiallybalked at my request to put him in second instead of first grade math. I watched a whole hour's math lesson in each grade, and sent a very neutral description of what I saw to our educational advocate (hired on behalf of my daughter, but quickly redeployed for DS), who came up with this arrangement - 4th quarter 2nd grade now, then 1st quarter next year, with his ultimate placement to be decided Nov 5 of next year.