I'm not convinced this is correct... Most tourists seem to want a touring bike to have a more upright riding position than a standard road bike. A larger frame will usually have a longer top tube, which places the bars further from the saddle leading to a more stretched out position on the bike. For a more upright position, I would think you'd want some combination of: a longer head tube (to raise the bars), a shorter top tube (to bring the bars closer to the seat) and a shorter stem (again: bars closer to the seat). That's what I did for my touring frame anyway...