I've been in Singapore for 1 year as an exchange student. While I managed to cope well, many slightly less talented students suffer from the great workload and have almost no free time. In a middle class secondary school, about 95% of the children need tuition to keep up with school. Weeks or even months before their exams, all free time is eliminated and dedicated to studying.
The learning itself isn't perfect either. It's heavily focused on memorization and involves no oral participation. Foreign languages are almost never taught; math and natural sciences matter the most. Competition is promoted instead of teamwork (not only amongst students, but also amongst teachers and civil servants in general). The teachers are ranked according to their students' results, which does work as a motivator, but discourages them to explain any background information or topics that are not required from exams.
Parents urge their children to get the best degree they can in order to be able to take up the best paying job they can find. Money is the measure and not personal satisfaction. Arts, therefore, are not very popular.
I'm highlighting here all negative aspects to contrast the posted article; of course it is good that Singapore does promote education and the education system certainly works better than the ones of most other countries. Also, this is not directly related to Singapore, but represents the Confucianist mentality that one can find to a lot extremer extents in Japan, China and Korea.