Despite the fact that students seek hard and fast rules for grammar that are ALWAYS true, they don't seem to exist in reality. I used to cringe when I'd hear radio talk-show hosts on NPR use the word 'less' with a countable noun like people, probably because I had just taught my students that they should use the comparative 'fewer' in that situation. However, as is stated in this VOA (Voice of America) interview, grammar, like other aspects of language, is not as fixed as we were taught to believe decades ago. Grammar reflects the way people use the language. As has often been noted in this blog, as English becomes more and more globalized, what is accepted as standard structure will continually change with the expanding 'speakership.'