5 different players for Georgia Southern rushed for 70+ yards against them. They gave up a total of 576 rushing yards in that game. If Miami made it a goal, Duke could have 300 rushing yards by halftime.
You have the correct idea. In Las Vegas I had a good percentage in betting the games with huge spreads. If the favorite was a relentless run oriented team, I'd generally give the points. If the favorite was a pass happy team, I'd generally take the points.
Public perception was typically the opposite so you'd get a break in the line. Invariably the passing favorites would get bet up, and the running teams would get bet down. I remember one handicapper on the Stardust Line in Las Vegas, circa late '80s: "If I'm giving points like that I want the ball in the air!" I had to chuckle. All the trends and the logic slanted the other way.
There's no surer way to ruin a drive and lessen a massive physical advantage than by throwing the football, when there's no need to do it. One sack and one dropped pass can ruin the cover. Meanwhile, the running teams continue to pound away. Their offense doesn't change markedly in the second half. The pass happy teams can score a ton in the first half and then virtually nothing in the second half. It's considerably more random.
BTW, some recent articles claim that Oklahoma State or Florida State last season sported the largest recorded pointspread ever, when hosting Savannah State. That's not true. I was working at the Horseshoe sportsbook as supervisor in 1989. The Houston/SMU game was anticipated for months, due to the certainty of a massive spread. SMU was a doormat after the death penalty. By the week of the game that spread reached as high as 73.5 at our book. I heard reports that some spots climbed briefly to as high as -74.5, which would have been enough for SMU to cover. They lost 95-21. I never saw that -74.5. The spread at our joint and at every sportsbook I looked at -- more than a dozen of them -- was in the -72.5 area for most of the week. The line dropped to 69 or 70 at game time. But -72.5 was the predominant spread all week. There are some online sources, including from the New York Times, that badly misrepresent that spread, claiming it was in the high 50s. That's nonsense. Notre Dame hosted SMU later in the season and also gave a huge number, in the high 60s. The Irish failed to cover. That was the game in which one Notre Dame running back ran out of bounds on purpose rather than score, which the SMU coach Forrest Gregg took as a slap in the face to his program. In those games I bet the favorite both times, so I ended up with a split.