I paid top $$ for my wedding cake from a very well known Sydney cake specialist and wasn't very happy with the taste of the cake itself on the day (although it looked exactly as I wanted it).
I found out later that they outsource the cake itself and decorate it in house. I'd double check that they make AND decorate it and I'd make sure the cake you taste is exactly the same as the cake they give you on the day.
I bet I know who you are talking about!
And yes I feel there is more to wedding cakes then what they look like, they must be made with the best ingredients and taste as good as they look!