It all comes down to who the rest of the coaching staff is.
It's very silly to compare Duke and Carolina to Wake Forest. Take Duke. Their head coach will be in the hall of fame. Their #1 assistant has 13 years of head coaching experience, 5 years of assistant experience. Their #2 assistant has 5 years of high major assistant experience. So, yes, it's a bit different deal to have an unproven #3 assistant than it would be with a 3rd year head coach where neither the #1 or #2 assistant have any high major coaching experience (if Manning moves his Tulsa staff over).
Now, if instead, Wake pulls Norm Roberts from Self's staff to be the associate head coach (currently KU's #2, with 6 years high major head coaching experience, 11 years on Self's bench, and 1 on Donovans) and Ulric Maligi from Brown's staff to be the #2 (currently SMU's #2, with 4 years of low-major experience, 2 years on Houston's bench, and 2 on Brown's) then I think it would be awesome to have Childress as the #3.
Note: Ulric more illustrative than anything..has the perfect resume to recruit Texas, which isn't necessarily what we want.