I'm going to come across as a total dyiick slurper. But yes, I definitely believed it then. You guys were so hung up on our failures last year, especially Gattass, and the belief Mario was committed to a Bro Offense. It was clear to a lot of us that Mario would never settle for "mediocre and boring". He F-ed up bigtime in his coordinator hires ... BIG TIME. But the man left a Top 5-7 program in Oregon to make Miami great again. There was no way he was going to fail. It was just a question of time.
Also, despite the fact Nick f-ing Saban desperately wanted him, everyone magically forgot how impressive TVD was over the last 7 games of 2021. He average over 300 ypg with a significantly more porous OL, essentially no blocking TEs, and a much weaker RB room. What I couldn't predict was this group of WRs would be better than Rambo/Harley/KSmith/Restrepo. But every other piece was certain to be better. ... So fix the OC, and the team was primed to fire on all engines.
We're just so conditioned to expect failure that we fans weren't willing to (fully) believe in what Mario was building, even as the boosters, administration, former players, existing players, recruits and transfers all bought in.