re: How good is this Gonzaga team?

The difference between this year's Gonzaga and other Zag teams that underperformed in the tournament is that they have a super talented athletic big men. Few's teams have had a few good big men, but have mainly been guard dominated teams. There's no team in the country that has as good of a front line as Gonzaga with Elias Harris, Kelly Olynyk and Sam Dower. Kevin Pangos is a great steady shooting offensive guard, and Gary Bell Jr. is your typical streaky college shooter.

Gonzaga hasn't underperformed in the tournament based on their seedings, bar a few first and second round upsets. They typically lose to Final Four or championship caliber teams.

Sweet 16 team at least, national finalist at best.

Look at their non-conference wins:

@Oklahoma State
Oklahoma (neutral site)
Kansas State (neutral site)
Clemson (neutral site)
Davidson (neutral site)
West Virginia
Baylor
@Washington State

Add to that an undefeated conference record with two wins over St. Mary's.

Gonzaga is beatable when opposing teams can limit their possessions, as Gonzaga is one of the most efficient offensive team in the country, and drain a bunch of threes. It's what Butler and Illinois did well in their wins.