The thing is, the articles that gave the fight to Tunney mostly concentrate on that first round, stating that since Tunney knocked him down hard and was forcing the fight (being aggressive), he deserves the nod. Loughran showed slightly more skills, cleverness and clean punching than Tunney, ie the clean punching, defense and ring generalship criteria belonged to him mostly. Outside of the 1st round, Tunney landed mostly on the body, based on round by round report from another newspaper, which also gave the nod to Tunney because of that knockdown, and was anti-Philadelphian based on this part: "Tommy lost. But you would have a hard time convincing the South Philadelphia boxing zealots that such was the case.". While Loughran was landing to the head. It was kinda ridiculous actually, how they scored rounds for Tunney easily, but every round where Loughran was better, they say the round was even based on Tunney's agressiveness and Loughran using clinches too much to their taste. They gave rounds 1, 5-7 to Tunney, with four even, but only 1st and 6th were Gene's round clearly, the other two were close and could be scored even or for Loughran, depending on what you prefer to look at when desiding the winner of the round.
Tunney vs Loughran. Most felt it was close, but Tunney won. I suppose we can look it as a modern day split decision.
Most is whom? Most newspapers simply re-printed the newswire, that doesn't give much reason to this decision. They mention knockdown as the reason of giving him a hair-thin decision, not round-by-round score.