Baylor switched defenses against us and yet we shot the lights out, too. We win with Frank and we aren't even talking about this.
Anyway the historical SU three point percentage defense is in the Media Guide, (page 165), I took it back to the beginning of the collegiate three pointer, 1986-87. I'll include our percentages, (the first one) which were obtained vs. mostly man for man defenses. To save a bit of key pounding, that season will be "1987", the next year "1988" and so on.
1987 .403 vs. .357 = +46
1988 .378 vs. .371 = +7
1989 .370 vs. .353 = +17
1990 .331 vs. .320 = +11
1991 .353 vs. .320 = +33
1992 .335 vs. .314 = +21
1993 .324 vs. .354 = -30
1994 .306 vs. .328 = -22
1995 .340 vs. .342 = -2
1996 .360 vs. .299 = +61
1997 .365 vs. .296 = +69
1998 .329 vs. .322 = +7
1999 .311 vs. .341 = -30
2000 .354 vs. .326 = +28
2001 .335 vs. .322 = +13
2002 .333 vs. .314 = +19
2003 .344 vs. .303 = +41
2004 .328 vs. .294 = +34
2005 .313 vs. .326 = -13
2006 .339 vs. .342 = -3
2007 .365 vs. .327 = +38
2008 .341 vs. .353 = -12
2009 .345 vs. .295 = +50
2010 .391 vs. .302 = +89
2011 .354 vs. .315 = +39
2012 .349 vs. .315 = +34
2013 .334 vs. .284 = +50
2014 .331 vs. .345 = -14
2015 .301 vs. .315 = -14
2016 .360 vs. .307 = +53
2017 .381 vs. .342 = +39
2018 .318 vs. .318 = even
2019 .333 vs. .329 = +4
Our three point defense was really good from 2009-2013, when it averaged .302. But it was about the same last year as it was in 2011-2012 and the decline this year probably has a lot to do with the Frank Howard situation.
2010 was when we shifted to 100% zone. It doesn't seem to have hurt our three point defense.
For me the big takeaway is that our three point percentage, against mostly man for man defenses has been higher than what we've given up 24 times in 33 seasons. We haven't tended to be a "shoot the lights out" team and most of our opponents have tended to be more dependent on the three pointer than we were.
Our success seems to have varied based on the quality of talent we had on specific teams. Surprise, surprise.