This is an unnecessarily pessimistic interpretation of what happened. Most people felt Lee would start because he had started the previous year, and we had done well under him. When Martinez got the gig, most people simply supported him because he's a Husker, not out of some bandwagon fandom.
NU 2009 Season, courtesy of Wikipedia:
Date Time Opponent# Rank# Site TV Result Attendance
September 5* 6:00 p.m. Florida Atlantic #24 Memorial Stadium • Lincoln, Nebraska FSN PPV W 49–3
September 12* 1:00 p.m. Arkansas State #22 Memorial Stadium • Lincoln, Nebraska FSN PPV W 38–9
September 19* 2:30 p.m. at #13 Virginia Tech #19 Lane Stadium • Blacksburg, Virginia ABC L 15–16
September 26*† 6:00 p.m. Louisiana-Lafayette #25 Memorial Stadium • Lincoln, Nebraska FSN PPV W 55–0
October 8 8:00 p.m. at #24 Missouri #21 Faurot Field • Columbia, Missouri ESPN W 27–12
October 17 2:30 p.m. Texas Tech #15 Memorial Stadium • Lincoln, Nebraska ABC L 10–31
October 24 11:30 a.m. Iowa State Memorial Stadium • Lincoln, Nebraska FSN L 7–9
October 31 11:30 a.m. at Baylor Floyd Casey Stadium • Waco, Texas Versus W 20–10
November 7 7:00 p.m. #20 Oklahoma Memorial Stadium • Lincoln, Nebraska ABC W 10–3
November 14 2:30 p.m. at Kansas University of Kansas Memorial Stadium • Lawrence, Kansas ABC W 31–17
November 21 6:30 p.m. Kansas State Memorial Stadium • Lincoln, Nebraska ESPN W 17–3
November 27 2:30 p.m. at Colorado Folsom Field • Boulder, Colorado ABC W 28–20
December 5 7:00 p.m. vs. #3 Texas #21 Cowboys Stadium • Arlington, Texas (Big 12 Championship Game) ABC L 12–13
December 30* 7:00 PM vs. #22 Arizona #20 Qualcomm Stadium • San Diego, California (Holiday Bowl) ESPN W 33–0
*Non-Conference Game. †Homecoming. #Rankings from AP. All times are in Central Time.
Would you really say we did well under Lee, Knapp? I mean, perhaps against the Sun Belt. But the same lee that piloted us to 10 points in the OK game? The same one on the field in the ISU game? That threw a pick the first offensive play after we got the momentum back from that pick in the Big 12 Title game? I will say he could've done worse in the CU and KU games. The Arizona game was an offensive anomaly for the whole team.