still need "www" meh?

curious on how many "major" singapore sites do not work if you don't put in www in the url.

in this age where the glc, statboards are going for shorter/hipper .sg domains... makes you wonder why the "www" is needed.

e.g. try:

1. cpf.gov.sg
2. hdb.gov.sg
3. sim.edu.sg
4. gov.sg
5. ....let me know

or is this a case, of .... one wrong, the rest copy&paste also wrong lah.