Intake boot leak result?

[texactii at csonline.net]

I noticed mention of a power loss due to an intake boot leak
on a 5000.  Would someone be so kind as to explain how a
leak in the intake boot causes this affect.  I am not
disagreeing with anyone, just wanting more education - intake
boot goes from fuel distributor to throttle body, path for intake
air, leak means more air going to throttle throat right or
wrong?

Tex Terry, II
83 5kt sedan (non-quattro)
Franklin, PA  USA