I truly believe that these three words are approaching the designation of "contractions", which is exactly where "modern" American language seeks to "re-assemble" it's spoken counterpart, and should be allowed to continue to develop as American, not as English. (don't make me say it again) When lines are drawn, quite often it is viewed as a challenge to cross (as I know someone will to my using the word "exactly"). It may be more accurate to say, "draw all the lines you want, we ain't payin attention." The "media" is notorious for that.