Are Canadians treated differently at inspection as opposed to people from other countries?

CBP Response: 

A Citizen of Canada arriving at LAX is inspected in the same manner as any other arriving alien. While exempt from most nonimmigrant visa requirements, a citizen of Canada is still required to meet the same burden of proof as any other alien and to establish his/her admissibility to the satisfaction of the inspecting officer.

source: CBP/AILA Southern California Chapter Liaison Meeting September 24, 2013

Tags: Border, Canada, Canadian, Canadian citizen, CBP, customs, customs and border patrol, Customs and Border Protection, LAX, nonimmigrant, NonImmigrant Visa, U.S. Customs, united states customs, US CBP, us customs, US visa, US visas for Canadians