Employee attitude is a function of the culture in which they were brought up. As a former customer and Canadian Plus member (oh, and son-in-law of a former CP senior exec), I can attest to the general positive vibe within the company.
If there are any current AC employees who worked at Wardair, they'd have been very young when they started. It's unlikely that many former Wardair employees remain at AC, and those who do would not have spent very many years within the company prior to the CP takeover. Could the CP staff conceivably have retained their positive corporate culture for all these years, despite having been working within the AC organization the past 18 years? Sure, but it's reasonable to believe, and is evidenced by the rapid change within the Westjet culture, that there are jaded ex-CP staff (and to be fair, positive AC-only staff) currently working.
However, to imply that we can cleanly sort CP vs AC staff today by their demeanour is exceedingly simplistic. Claims that older, close-to-retirement staff are more likely to bend the rules is similarly lacking any evidence whatsoever; it's generally an accepted notion that we become more rigid in our beliefs and actions as we age.