You might want to check some archived highlights because MMcN has been abusing all levels of opponents with it for 2 years. Tony M also had plenty of success with it.
It's extremely effective when you have a physical advantage (height and athleticism, which both of above possess) and a QB who can let it hang then drop with about 3 yards of corner left for the receiver to make a play and stay in bounds (which Vandy has shown he is consistently capable of doing).
The other benefits are:
-- It avoids the congestion of the red-zone. There's all kinds of "straight-line" throws but a lot higher risk of the pass being defended or picked by LB's and CB's without having to cover as much real estate. The fade puts the ball in a one-on-one situation, ideally where only the receiver can go get it. Yes the receiver still has to make the play but the risk of virtually zero turnover vs the reward of 6 points make it as smart a play as any in the red-zone.
-- Because it isolates the CB and creates a jump-ball scenario, it can often result in defensive holding / pass interference, which, by rule, puts the ball on the 2.
It's a great play call from the 25 to the 10 for all the reasons above. Any closer to the end zone and it's just too crowded / not enough room to execute with consistent effectiveness.
I hope we try it with Marvin / Keenan all day long. You might recognize it from film study but it doesn't make it any easier to defend, especially with as well as Iowa has executed it to date!