Just to note, FI and I fully plan on serving dinner at our reception, but my sister and her FI are planning on having a "cocktail" reception - meaning no formal dinner. Her ceremony will be at 5, and the reception will start at 6. I know (because I am nomnoming as I type) that I usually eat around 6, and a lot of people have dinner around this time too. I'll still be set from lunch before the wedding starts, and sorry sis, snacks aren't going to cut it. She is also planning on serving wine, beer, and frozen margs. From past experiences with people, alcohol and light finger foods don't mix well.
I think it is very rude not to serve dinner at a dinner-time reception- especially when people in this area are perfectly okay with a BBQ buffet! For our end of year party last year we had BBQ catered and it ended up being $14/person WITH tea and sides. (Splitting tip and tax costs)
Her reason was so that she could cut costs and be able to splurge on a nicer dress, decorations, photography, and venue (venue is booked btw). "No one remembers what they ate at a wedding." I feel that there are other areas you can "cut costs" without sacraficing the dinner. I kind of view dinner as a "thank you" to the guests, but I'm certainly no wedding expert. I could be way off the mark on this one, which is why I am asking you ladies... and yes, I am scared of E, so I'm not going to post there!
So thoughts? Opinions?
Oh and no, I haven't talked to my sister about my thoughts on this.

