Cross and Seatback, you guys haven't even read the article. It doesn't just contain the "whingers". It has the most complimented companies, a list which contains the name "Qantas". RTFA.
Jetstar is a complained about company. Perhaps their idiotic check in procedures are the cause?
It is noteworthy that Virgin are also a "low cost carrier", yet they didn't make it to either list?