These three schools have successful football programs; until this year each have had a Head Coach for at least ten years; and each school has a new offensive coordinator. So, how have the NCAA rankings changed when Lincoln Riley followed Ruffin McNeill from Texas Tech to East Carolina; and when Neal Brown left Troy to come to Tech with Tommy Tuberville?
To keep it simple let's just look at the following four categories:
Passing Offense, Total Offense, Scoring Offense and Total Defense
[Note: The stats below compare the 7th week of 2009 with the 7th week of 2010. See TTpilk645's comment below where he posted year-end stats for 2009.] ~Nm RaiDer FAn
In 2009 under Team Leach with Riley and McNeill, Tech was ranked #2, #3, #2 and #49 in those four categories. This year under Team Tubbs with Neal Brown, Tech is currently ranked #6, #29, #29 and #102.
In 2009 East Carolina was ranked #79, #93, #79, and #56. This year under Ruffin McNeill and OC Lincoln Riley, East Carolina's current rankings are #8, #40, #14 and #115.
And what about Troy? The Trojans have been conference champs for the past four years. Tony Franklin is credited for turning Troy's offense around when he was hired in 2006. Neal Brown took over for Franklin when Tommy Tuberville hired Franklin just days before Auburn's post season bowl game at the end of the 2007 season. [see Tony Franklin link for more].
In 2009, Neal Brown's last year as OC at Troy, they were ranked #15, #29, #80 and #85. This year, Troy appears to be making improvements; their current rankings are #11, #14, #23 and #88.
I'll let you draw your own conclusions.