Have to wonder about these kinds of surveys sometimes. Choice also has an international airline survey on their website
On flights to Asia, Singapore Airlines was voted top to Bali (how many people fly to Bali via Singapore - statistically significant?).
Emirates ranked highly to Singapore (but they don't fly there from Aus)
Qantas doesn't fly to Malaysia (unless a codeshare ex Singapore?)
Malaysian Airlines to Vietnam (again how many take this route).
I think these surveys have bias predisposition. You had a good flight on Airline X recently, and so when filling out this kind of survey, you rank it top in every category without much thought.