Gotcha. After rereading my post I thought maybe I could be more clear about What I said. I think most of the wholesalers a d stores around here that would bring IT in are wise to the Sumatran trend. Because ST are all but priced out of most of our budgets these Sumatrans are the best we can do and shops and sellers know us Dat keepers would fork over more cash for a more stable fish. Less than a year ago the same size data were around $20 and almost always labeled tiger datnoid, now it's hard to find them not labeled Sumatrans at about +$30.
My skepticism is in the difficulty of knowing weather or not this is just a name tagged on to get buyers who've heard or read Sumatrans are the current, "hotness" to bite where they may not have been inclined to do so if they thought that would be an IT we're more accustomed to the last 10 or so years (unstable, brownish, etc).
If someone could correct me I'd be glad to be wrong but I don't know of a reliable way to Identifiy an IT under maybe 3-4" between a more common IT and Sumatran IT. In my experience seeing literally hundreds of baby IT in wholesalers a lot of them can be stable at smaller sizes and it often changes soon as you get them home out of a bare bottom tank filled with other tigers.