Traditional scones in Dallas?
Try the Black Forest Bakery ( "Black Forest Bakery & Henk's European Deli" is the full name). It's on Blackwell street - behind that HUGE Half-Price book store
Obviously, their desserts tend to have a European flair. I've never looked for scones there, but they may have them. You may want to call them before you actually go there.
I like their desserts because they are not sickly sweet and "giganto". However, I've only been there two times so perhaps I am not qualified to make that statement.
Central Market locations in Dallas, Plano, and Fort Worth make various flavours daily -- including a couple of savoury ones. If you're curious about the taste and texture, just ask one of the bakery guys to let you taste one.
BTW, they also make cute little mini scones as well.