Blunt wraps definitely do get me more high than joints, but again as others and myself have said here, I think it's the burn temperature. Tobacco in the joint would lower the temperature, and smolder better. Any blunt smoker can tell you they smolder really well. After all, we're ideally just trying to heat the resin up enough to vaporize, but combustion temperatures are way beyond that level, so a lot of THC gets destroyed by fire. Slower burn, less heat, less wasted THC. There's other ways to achieve that though. I just love blunt wraps. I would never mix tobacco into the core of the blunt though. Yuck.