Yeah, I drank the Power Plate Koolaid.
In retrospect it might not have been necessary in a pressurized plenum where the valve and valve events would have dictated flow. In the boosted LS world there are lots of common plenum intakes, even the Mid-Rise on our TBSS is a dual quad dual plane, and there are no known cylinder distribution issues.
That said, I never changed a head gasket in my Buick.