1) The ad title is 39 characters long (34 without kw term)
2) The ad title ends with an exclamation point
Could this ad possibly still be around from the old premium advert program?
Anyway, it is kind of unfair the advantage this ad gets over the others in the same group...
Many people are not aware that the Premium Sponsorhip program pre-dates the AdWords program, that it operates under a different set of guidelines, and that advertisers (and Google of course) are working under contracts subject to those guidelines.
After the first of the year, though, only one set of guidelines will be in play - and you should therefore see consistent ads.
AWA