I don't think it's ever been touted to have supercruise, and to suddenly make up that it does would be a very bold thing to do...
Easystreet is right, the only definition I've EVER heard, is being able to sustain supersonic without using reheat in level flight. Because Lockheed tries to suggest high subsonic speed or low reheat in supersonic is also supercruise, doesn't make it so.