My understanding is that while both "slow food" and "eat local" are good things, they are separate issues. Slow food, a term coined in opposition to the "fast food" meals people rush through these days, refers to taking the time to savor the flavors of your meal, to actually experience and enjoy the meal, rather than wolfing it down while texting. Local food, because it does not need to be shipped long distances - and can therefore be selected for taste and texture, rather than durability during shipment - will generally be much more flavorful than mass-produced food; but it isn't "slow food" unless you take the time to enjoy it.
My understanding is that while both "slow food" and "eat local" are good things, they are separate issues. Slow food, a term coined in opposition to the "fast food" meals people rush through these days, refers to taking the time to savor the flavors of your meal, to actually experience and enjoy the meal, rather than wolfing it down while texting. Local food, because it does not need to be shipped long distances - and can therefore be selected for taste and texture, rather than durability during shipment - will generally be much more flavorful than mass-produced food; but it isn't "slow food" unless you take the time to enjoy it.