Just looking at the numbers Creighton is 11-19 in the NCAA tournament going into this year. That ties them for 74th amongst all schools. They have never won more than 1 game in the NCAA tournament. They have been to one Sweet 16, which was before the tournament was expanded. Since the tournament expanded 30 years ago they are 5-11
I would argue much of their success comes from being in the MVC, which is very far from a power conference. Before Wichita State made their run last year they had not sent a team to the Elite Eight since 1981 and that team was Wichita State. The MVC was generally a one to two bid league, so if you put up a halfway decent season you had a legit shot at a tournament bid. They always did well with the RPI since many of their teams were alright and not dreadful. If you lost to them it did not kill your RPI and wins against them still looked pretty good.
I would also say the Big East is an improvement over the MVC, but it is not the Big East of old. When the teams split they forgot to bring along Syracuse, Louisville, UConn, Cincy, Pitt and Notre Dame. Pretty big omissions IMO. The Big East of old was always in the argument for top conference, now the argument is between the Big 10, ACC and Big 12.
I agree there is a big world of college basketball out there. I just see Creighton as an average team having the best year they probably will ever have.