I'd be surprised to learn if Ford programmed this sluggish response. It is unsafe from the standpoint that a driver becomes accustomed to the normal response of his/her vehicle. If I make a judgement to pull out into traffic because I am confident I can get out of the way, and then my truck does not perform the way it otherwise consistently does, I could end up in a serious accident. Yeah, these trucks are built for commercial duty, but lets not fool ourselves - thousands of people are driving these as personal vehicles.
I'm not just going to label drivers of commercial vehicles as knuckleheads who don't care about the way they drive a vehicle - tons of people drive their own cars into the ground, too. The manufacturers realize this. All my other vehicles respond normally in very cold weather, and don't seem to be too much worse for the wear as a result.
2015 Ford F-350 Lariat Crew Cab 4x4 6.2L V8 (current)
2012 Ford F-250 XLT Crew Cab 4x4 6.2L V8 (traded)
1999 Harley-Davidson Road King Classic, 88ci EFI Stage 2