Not buying this...The curse was placed well before 1970.
Lamar Hunt and other initial AFC owners placed the curse on The Vikings at the inception of the franchise due to the decisions Max Winter made on which league he was going to join. Thats a good 10 years before the trophy was lost.
And yes, 6 nfccg losses in a row is a curse, regardless of how many spheres Zimmer has in his office.