[Boost-users] [asio] when to use io_service::post or deadline_timer::async_wait?

Hi! After reading the referece docs I got the impression that the only difference between io_service::post and deadline_timer::async_wait is the fact that the former triggers execution immediately (after the caller function returns?) while the latter waits until timer expires before execution of the function object. Is this really the only difference or is there any other issue to be considered? Markus