When it comes to winter running in Alaska that quote is almost true. No doubt that wearing extra layers and running on loose snow or ice slows down the pace but not the effort. I generally just apply the normal running pace I would do if I was running in summer. Usually I just divide 7:00 pace into the time of the run to get mileage. Really, we should focus on time and heart rate (and results too, of course) but I'm a bit trapped by my early years of measuring miles so that's what I do.
Great week of training. Boston seems a little closer than it did last week.