According to what Michael said in an earlier email....
As it stands, you never need an internet connection ever. It tries to
use one, it tries to see if youve been sneaky and blocked out our
server, it tries to get round the blockage to connect to us, but if it
cant, it cant and it carries on.
It does still use internal checks to make sure the key you have is a
valid key, if it cant connect.
The only time you NEED an internet connection, is if you have had one
previously and the game found it was an invalid copy. If that happens,
nothing will make it start unless you have connected to the server again
to prove you should be allowed to.
On the OLD system
It wouldnt require a connection for install, but it would complain if it
couldnt verify that key after a while.
Seems pretty clear to me. Innocent until proven guilty.