There doesn't seem to be much question Janis has the mental horsepower, but sometimes its easy to overthink a role or job in an offense. So mastering the idea of the play or its details probably don't challenge him. Running it like its second nature, with no thought about steps or technique is another thing.
Bud Adams told me the franchise he admired the most was the Kansas City Chiefs. Then he asked for more hookers and blow.
"Everyone is entitled to his own opinion, but not his own facts." -Daniel Patrick Moynihan