"No, studies have not shown that the majority of low wage workers are young people living at home"
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http://www.statcan.gc.ca/pub/75-001-x/topics-sujets/minimumwage-salaireminimum/minimumwage-salaireminimum-2009-eng.htm

"close to 60% of minimum-wage workers were under the age of 25"

"Close to 60% of all minimum-wage workers lived with their parents or with another family member"

Now I will grant that among the 40% of minimum wage earners who are age 25+ the substantial bulk of them are women.  However 25+ year old women still make up a relatively small proportion of all employees being paid minimum wage.

Older workers very rarely earn minimum wage, only 8.8% of minimum wage earners were age 55+.