A family owned business has a policy of not speaking about the competition. Many companies I have worked with have a policy of respecting partners and competition. When it comes to doing business, I prefer doing business with those who speak fondly of their competition or say nothing at all.
A big turnoff in business is when you hear someone or some company badmouthing their competition. To me, whether it is a potential business partner, client, or vendor, the minute I hear something said about how poorly someone else does something, I turn off my listening head and decide that its time to consider someone else for the work.
Do you have a policy in place about your competition and how you speak about them? If not, it is probably time to put one in place.