having worked in 8 countries on that list, I feel emminately qualified to answer this. (Disclaimer: This is all answered from a female perspective)
in Denmark you can get 3 years paid maternity leave and your job is still open to you at the end of those 3 years, and if you get preganant again within the 3 year period it rolls over ( a friend of mine had 3 children in 7 years and is just now going back into her original job - with the appropriate salary increases).
Similar situation in Germany, plus they are very willing to consider part time working / job sharing for women. And the company I worked for in germany insisted that a minimum of 3 consecutive weeks were taken off for our summer break. (We got 32 days annual holiday + 12 public days).
Norway, Netherlands & France - very low weekly hours and strong focus on personal time.
Czech Republic - I worked nominally long hours (start to finish) but we would take 2 hour lunch breaks and the whole factory would also stop at any opportunity to watch 'important' soccer matches - on company provided TVs in the canteen (qualification: 'important' meant anything involving the Czech national team or any major european league game that might possibly affect a Czech team). Plus you could bring your family into the factory to watch the soccer matches (or not watch the soccer matches and just spend nice family time together).
Austria - very relaxed working style and Company very easy going about the need for 'family' time off. High number of annual holidays.
Italy - similar in some ways to Czech Rep - nominally long hours but every excuse under the sun is used to avoid actually "working" and family time trumped everything.
France - family comes first, number of official holidays was the highest in all the countries I worked in and it was also the country I had to do the least number of official work hours. I felt like I was a part-time worker LOL
Hungary was the one country on the list I felt I didnt have a good life balance in, due to the hours I had to work and the number of days off I was allowed.
Compare to OZ - I routinely average 50-55 hours a week, I only see hubby 5 days per fortnight due to the fact he works away on site, and because I am a contractor (as are a lot of the people I work with) I get no paid sick leave and no paid holidays ................... but I have a fabulous life here and the time off I do have is extremely meaningful and enjoyable to me. Plus I'm back in my home country and that means a lot to me after 24 years away.
having said all of that, here in Australia I'm on one of the highest wages I've ever been on (France and Norway excepted) plus I'm back living in my home country (HUUUGE factor in my personal work-life equation), so would I leave Australia right now to get a so-called "Top 20" work life balance? - H%^$ no!!!
There's not one of the countries I've worked in (and I've worked in 14 in total) that I would currently consider leaving Australia for - so for me those survey results are meaningless. If I wasnt happy being back in Australia then maybe, just maybe, those results might persuade me to go back to either Germany or Denmark or to investigate USA or Spain, but for me right now its a moot point. Ask me again in 5 or 10 years.
I can understand how non-australians could look at those result, then look at their life in Australia and decide they might be better off somewhere else.
Fortunately for me, my non-australian hubby is not one of those people