If these three chains are all involved, that would help. But if it's just Denny's, which is all I've seen so far, noooooo...
That would be a win-win-lose, and the diner's are on the short end of the stick. Flying J and Petro were the bright spots in the industry, and since Petro doesn't have an expediter shower/frequent fueler loyalty card for showers, that left the Hook. I can't say I've never had a bad meal at a Hook, but they've been the exception to the rule.
I can't say that I ever had a good one at the "J" or any of the major truck stop chains for that matter. The best that I can say is that a meal was not bad. They are all low quality, at least in my opinion, too much salt, little other flavors. Far too expensive, portion sizes are silly, other than that they are sorta ok. At least Denny's, while not all that much better, has a fairly good senior breakfast menu, smaller portions and lower prices. That is assuming that they carry that into the truck stops.