To help you understand my views, and to help me understand your views, here is a list of records. I'll mark what i think are "down" and you do the same. Let's see where that gets us
2002-03 / Mike Eaves / 13-23-4 / 7-17-4 / 8th
2003-04 / Mike Eaves / 22-13-8 / 14-7-7 / 3rd / NCAA Quarterfinalist
2004-05 / Mike Eaves / 23-14-4 / 16-9-3 / T-3rd / NCAA First Round
2005-06 / Mike Eaves / 30-10-3 / 17-8-3 / T-2nd / NCAA Champion
2006-07 / Mike Eaves / 19-18-4 / 12-13-3 / T-6th
2007-08 / Mike Eaves / 16-17-7 / 11-12-5 / 6th / NCAA Quarterfinalist
2008-09 / Mike Eaves / 20-16-4 / 14-11-3 / T-3rd
2009-10 / Mike Eaves / 28-11-4 / 17-8-3 / 2nd / NCAA Finalist
2010-11 / Mike Eaves / 21-16-4 / 12-13-3 / 7th
2011-12 / Mike Eaves / 17-18-2 / 11-15-2 / 10th
2012-13 / Mike Eaves / 22-13-7 / 13-8-7 / 4th / NCAA First Round
2013-14 / Mike Eaves / 24-11-2 / 13-6-3 / 2nd / NCAA First Round
02-03 - down year, first year for new coach
03-04 - good year
04-05 - good year
05-06 - GREAT year
06-07 - average/down year
07-08 - average regular season - good end result
08-09 - average year
09-10 - GREAT year
10-11 - average/down year
11-12 - down year
12-13 - good year
13-14 - good year
*14-15 - way down year
Out of 13 years; I see 1 way down year (yeah, this year is really rough and if you want to can a coach based on a single year of performance, then this would be that year), a couple of down years, a couple of average years, a couple of good years, and a couple of great years.
So yeah, I stand by my statement of 1 down every 4 years. Please identify which 2 or 3 of every 4 years you would classify as down years? I guess if you pick specific segments of 4 years (08-12) then yeah, you could justify that 3 of those specific 4 years were down, but you could also look at 03-07 and say that it was a fantastic run with 3 NCAA appearances and finishing above .500 every year.