For Tejas With AC CC as rake composition, I dont think it would be short distance as we already have Shatabdis connecting every important places. And if long distance CC I seriously doubt if people would be willing to shell out more money more sitting through 10-12 hours as fares are bound to be high given the services.
Humsafar would be a win win situation for govt and out&out success as 3A is the most profitable as well as most demanded for middle class.