15 seconds seems doubtful. Car & Driver tested the 2017 Mirage CVT, and it was 12.8. The slight weight penalty of the sedan can't add 2 seconds.
I hadn't seen this review before - thanks for posting it.
There seems to be a myth out there that "all reviewers hate the Mirage", but there are many like this that one that are more balanced and recommend the car based on the buyer's needs & abilities (financial).
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View my fuel log 2014 Mirage ES 1.2 manual: 62.4 mpg (US) ... 26.5 km/L ... 3.8 L/100 km ... 74.9 mpg (Imp)