Is Butch Davis in $Bill's sights? Stealing North Carolina's coach worked for Texas, who is to say it wouldn't work for us?

I think I am going to look into head coach hopping trend. I have a feeling that stealing a coach from another BCS conference has a NEGATIVE impact on a program. Maybe it is just the fact that the only coach I can think of two coaches hopped major conference (Fran, SEC -> Big 12 and Makie Brown, ACC -> Big 12) who cancel each other out, and there 349732 coaches that went from coordination positions at big programs or head coaches in non-major conferences to head coaches and did well (Stoops, Myer, Leach).