I posted a chart on the PC thread showing the cumulative winning percentage of every coach since WWII, so I thought I would do the same here:
As can be seen, Coach Souza is going in the wrong direction. From my research, I've concluded that in almost every case you can determine if a coach will be good after 5 seasons. Most show improvement from their first season, usually improving to 0.500 or better after 4 or 5 seasons. And while some coaches took even longer to reach a cumulative winning percentage of 0.500 or better, they showed other signs of being a top coach in those first five seasons: Coach Sandelin had a 0.471 winning percentage after 5 seasons, but he an excellent 4th season (0.667) in which he took UMD to the Frozen Four. Coach Berenson also had a slow start, with a 0.430 winning percentage after 5 seasons, but his 4th was a winning season (0.537), the first of 25 straight. And Coach Borek appears to be doing the same, as he has had back-to-back winning seasons at Merrimack in his 4th and 5th seasons.
Sean