Bullcrap. A drug-sniffing dog around a car is no different than a warrentless search.
The courts have always considered a search of a car different from one of a home. There are restrictions on warrentless searches, but those restrictions were not an issue in this case. The only issue before the Supreme Court was if the dog’s alerting created a reasonable belief that drugs might be there. Their ruling was that it MIGHT, but that a court needs to look at the total situation rather than focus on just one area.
On 9-0 decision, there probably isn’t much controversy involved.