Apparently not (big surprise) but the most important (and relatively overlooked) result to come from this pilot study in Rochester, Minnesota is an academic one. "...Rynearson and Superintendent Jerry Williams say the fourth- and fifth-graders are more focused on the curriculum than their peers in a comparison group in an ordinary classroom. And there are fewer distractions than in the traditional setup — where a lot of time is spent trying to get children to sit still." (emphasis mine)
Wouldn't it be delightful for kids to be able to get up and walk around to clear their heads, just like adults do? And what a boon for kinesthetic thinkers! Hopefully more schools will try this.