Skeeter, we'll just agree to disagree. Anyone who shoots 7MM, knows a thing or two about hunting!
In my area, I'd much prefer the scrapes! I do agree that they are mostly freshened at night, but a fresh scrape tells me he has been there very recently, while the exact age of rubs is hard to tell.
I also have seen bucks work their scrapes during daylight hours too.
Another thing I like about scrapes is that when you find a lots of them in one area, you know you've found his bedroom!
I think that the method of hunting scrapes would not be too different than hunting rubs. As always pay attention to wind, and travel directions, and try not to set up too close!