Yes the smell of an acoholic beverage emanating from a person can be distinctive, but, to repeat, technically speaking ethanol is odorless. So any statement that refers to a smell of alcohol without some sort of qualification is leaving an opening. Not saying that it is an adequate defense or would count for a lot. But, the DUI attorneys I have spoken with are not going to turn down an opportunity to play such word games with an officer on the stand to try and lessen his credibility. Since most court cases related to DUI, speeding, etc. hinge heavily on the officer's percieved credibility, I would be surprised if an attorney would not jump at the chance to challenge semantics and try to make the officer look foolish or self-contradicting. Others are welcomed to their opinion, I am just going by what i have heard specific DUI attorneys say on this matter.