We had the kitchen sink last year and it was 2 adults and 3 teenagers and it was plenty. My husband and son finished it but it was a struggle and they can eat...
This is one dessert that is big enough for 6 adults. I watched 4 teens attempt it back in May. They were all smiles when it came out, but their expressions changed after awhile.
We've never ordered this but we've seen it. It doesn't look appetizing to me; it's kind-of like some of everything dumped into one dish. I am sure it's more than enough for 2 adults and 2 kids!