If he's already at the top of the test (which was likely the case in year one, when it was the 2-5 test), then negligible change, or even a slight decrease, is not surprising. A slight decrease on changing to the new level is also not strange. He's still near the top of the norms on the 6+, so there's not much space to move up. .
I guess it just seems odd that it's nearly the same RIT as the beginning of almost two years ago, so the percentile keeps dropping; 90th percentile doesn't seem near the top on the 6+ (I guess that's relative; it equates a respectable 80th percentile 2-3 grades above). I suppose my feeling disappointed about the lack of honors/GT/differentiation in literacy in middle school is reinforced by a stagnant number, perhaps unfairly.
