Yeah, but if you're booking more than three months out or so, it's very possible they'll change to the LUS version. This has happened to me on ORD-CLT, CLT-DFW, and I've seen it on many flights to the west cost out of DFW. Booked the specific flights designated as "Sharklets" only to have them changed to the old turkeys when the schedule changes were loaded- which seems to occur most weekends.