Or even if the problems have already cropped up in overseas markets. Ford and Holden releases their Falcon and Commodore here in Australia first, problems would crop up. Toyota and other makers releases their vehicles in other countries first, problems would be first discovered there, Australia would therefore get the updated versions.Surveys such as this one can be taken with a grain of salt.
There is no distinction between a small fault (ie: a rattle) and a major fault (ie: an engine failure).
To find out which car has had the least problem and or recalls then you would need to find out the cars history (including those from its home country).