I do think that the location / region does dictate what type of breakfast you should serve - to a degree! It also depends on the type of market you are catering to or want to attract.
I do serve a gourmet breakfast. This is one of my trademarks and is a nitch that only we fill in the area. The big city B&B's near us can not (local law) serve anything but continental, some of the other neighboring town B&B's serve a breakfast but not like ours. Our breakfast is our most commented amenities and one of the top reasons people return. I do make my on preserves, buy local fresh fruit - every day or two, and most of my recipes are based on local flair.
Do I have those that skip breakfast, you bet - I posted about that last week. I do a lighter style breakfast for early (business) breakfast people during the week and most will say, wow if this is your simple breakfast, I must come back and enjoy the real thing. Do I have those that see what I serve and the next day say - can I just have a simple scramble - yes! But for the most part, the gorumet breakfast is working for me. I have calcuated my average breakfast cost to be around $1.00 to $1.50 per person depending on what I serve, this only is based on grocery costs*. My room rates ave. $110 per night.
Again, I am not saying that every B&B in every city should serve a breakfast like mine. -.