You should also consider the timing of the announcement. This pricing change was made on a Monday morning - people are already grumpy from returning to their regular work week but it also was a "special" Monday as it was a holiday for some. Thanksgiving for all Canadians and Columbus Day I believe for some (all?) Americans. You potentially affected numerous holiday brunches with the timing of your pricing changes.

NOTE: I haven't used your company before but it seems like it would be useful so I'll certainly consider it if I'm in need of this type of service in the future.