Back from our meeting (well, yesterday!)
It went quite well; I basically followed the format of the letter when telling her what we wanted. She agreed (obviously) that yes, the MAP is a test of what the child has been taught, not how the child learns, and that the test would only show what B already knows.
I think we'll be able to get him a trial period in the accelerated first-grade math group (which I think he'll probably really like), and I straight out told her we'd like to start the Iowa Acceleration Scale process now. She said start that process. I think she realized that we meant business.
She ended up pulling out the "Well, even if we skip now, there are often issues that show up down the road at adolescence" card -- ie, we shouldn't skip him now because then he'll be younger than his classmates as a teenager. Gasp! You know, I didn't quite realize that? :P I explained nicely that we'd deal with that as it came up.
The fact that her next argument is that the problem will be adolescence means she realizes that he's ready for something else now. She fully agrees that he's way beyond the K curriculum in both math and reading, so that's not the issue anymore, apparently. It's pretty hard to deny that.
She's going to get back to me in the next week or so, and then we'll schedule a meeting for the last week in January (probably, maybe earlier, maybe a bit later) to discuss what will be done. I told her that if he were going to start pullouts, we'd like to get this process going sooner rather than later.
So ... I think I was successful, unless she was just smiling and nodding. Hooray for me! We'll see what happens in the next few weeks. Even if we don't do a skip, I really, really want him in that math pull-out. I think he'd love it.