Truck manufacturers have all increased their towing capacity on half ton series trucks like the Ford F150 so as a marketing strategy the RV industry is doing their part to couple buyers with this increase. Grand Design Reflection is a good example of "half ton towable" offering. I own a Reflection 27 RL which is marketed as one of these units and I tow it with a 2500 Ram Cummins. I cannot imagine towing it with an F150. There are significantly more folks out there with half ton trucks than there are those with heavier F250 or 2500 series. The RV industry is just trying to get into this market. Yes a half ton will tow some of these trailers but for the long haul or going to the mountains you better have more truck in my opinion. I met a guy in Colorado last year towing the exact trailer as mine and he said he screamed the engine to get over some steep grades with an overall MPG of 8.