I watched for a bit and saw David take a bite, or more, of every offering, then discard the rest. He raved about the items, as would be expected and seemed to be enjoying himself.
I manage carbs, but I'm far from KETO, but I wouldn't like to feel pressured to gobble-up so many carbs on a long food airing like last night.
Having Steve taste some of the items isn't really something that's totally new. Before David lost weight, hosts would frequently come by for a taste.
I think Steve pairing up with seasoned hosts is part of his ongoing learning process. Not just to take those 'big bites,' so David doesn't have to.