Yup- just like the reception meal. You get one small chicken breast and a small scoop of rice and 3 springs of broccoli. For many, that is not a meal- except my 85 year old grandma. If you host "big eaters", "Jethros", "my 4 teenage sons", or the like, you double or triple accordingly. I think EVERY consumer knows "suggested serving size" runs small (2.5 ozs. of meat?). It is up to the host if they will provide an "all you can eat trough" or a small (airline size?) portion. And the guest says thank you!
Maybe all should contract/ post sign- " Cake servings sizes are estimated based on ____________ chart, available by request. Specialty cakes, carved cakes, method of slicing, and preparation may affect ultimate serving sizes. Customer understands and accepts these terms, and has order their products accordingly."