Many companies have learned (the hard way) that public statements are admissible to court. All public statements from most big companies go through many levels of checking to ensure they don't send a wrong message.

I know of one case where the warning label on a lawnmower that rocks can be thrown conflicted with the advertising picture of a kid close to a lawnmower and therefore the company doesn't believe that warning lable. I'm not sure what came of it (probably settled out of court for big $$$). However many companies are careful what they say.