Gonzaga's tournament success over the last 20 is comparable to what Xavier has done in that time span.

Few you say has only won 21 tournament games? That is a load of games. Xavier has won 18 games in the same timeframe as Gonzaga and they moved onto the Big East.

I've said it before the WCC is quite similar to the A10 when you look at the traditions in that conference. BYU and Pacific add some depth. BYU is 14th all time in wins.

Basketball Tiers:

Power (P5 + Big East)
High Major (A10, WCC, MVC)
Group of Five
Mid Major

Between the Power, High Mid's, G5's 14 conferences only 1 is not in the Top 14 of the RPI and that is CUSA which is a hot mess.

Gonzaga is a major program but its not a blueblood. Its not too different than the programs that comprise the Big East.