Any address can be tracked easily. But the owner of address is anonymous. At some extent it is still anonymous. We can generate as many addresses as we can to receive BTC instantly with no one knowing the owner.
Yes, as long as your address(es) is(are) not revealed you are "anonymous". You could still be tracked (IP, exchanges, etc) but it would demand some effort.
Getting court order to subpoena exchange can be done fairly easy with patriot act.