Strength of Schedule. While it seems like every time Gonzaga turns around they're playing another ranked team, they haven't been like we have.
According to https://www.espn.com/mens-college-basketball/standings ↗
Jayhawks 4-1 against ranked teams, the next closest number of games against ranked teams is 3 with quite a few teams. Duke and Kentucky are 0-4 against ranked teams.
Some other factoids: PAC12 0-8 against ranked teams.
SEC has played 7 ranked teams. They have 14 teams in their league. Misery, kudos to them, rare on these pages I know, is 2-0. Rest of league is 0-5.
BIG has a lot of games and wins, but really most of those are because they're into their league schedule.
Wisconsin is 2-0 against ranked teams and beat MSU in E. Lansing today!
But the Jayhawks, wow, 4-1. No one else with 3 wins.