I thought I was always taught at school that criticism meant evaluation and opinion, either positive or negative. These days, it seems criticism, or to criticise, is almost exclusively used to mean negative commentary. Dictionaries seem to acknowledge both variations, but has there been a semantic shift in the words recently, and what is the usual meaning?
Wikipedia, for example, has many Criticism sections which are generally a list of negative opinions. Whilst I know they are discouraged for this reason, would they semantically be better named Negative Criticism sections? On the other hand, a film critic is still assumed to give as many positive reviews as negatives, so this would seem inconsistent.