I don't believe this to be the case. When the first squadron switched, they sent all of the community's A-players there. Obviously that can't work out for the majority, so superstars didn't fare too well. But it wasn't because of a stigma attached to the tour. The community learned its lesson and now you'll see post-RAG SJOs along with "other" SJOs showing up at the transition squadrons. It may not be the coveted <insert golden billet>, but I don't think the transition part of the community has been around long enough for anyone to really know.
Of course I say that as someone looking from the outside (and somewhat indifferent), but not that far outside, at least right now.