The Metro today is showing an early poll with McIver getting 44% of the votes; Hawksworth comes second with 13% three months before election time.
http://www.metronews.ca/calgary/local/article/585273--poll-shows-mciver-in-the-lead
Keep in mind that a partner in the firm that conducted the survey, Devin Iverson, is also McIver's campaign manager.