altq confusion

[Chris Smith <bsd782_(_at_)_chrissmith_(_dot_)_org>]

Both Jacek's book and the pf faq, 
http://www.openbsd.org/faq/pf/queueing.html, state that queueing is 
only useful for packets in the outbound direction.

Yet, I find examples that show inbound traffic being sent to queues.

On the faq page above there are these examples:
--------------------------------------------------
pass in on dc0 from $it_net to any queue it_int
pass in on dc0 from $boss to any queue boss_int
pass in on dc0 proto tcp from $int_nets to $wwwserv port { 21, 80, \
	49151 } flags S/SA keep state queue www_int
--------------------------------------------------

At http://www.benzedrine.cx/ackpri.html there is this:
--------------------------------------------------
pass in  on $ext_if proto tcp from any to $ext_if flags S/SA \
        keep state queue (q_def, q_pri)
--------------------------------------------------
Also confusing here is that he's dealing with a ADSL and there is a 
bandwidth difference between incoming and outgoing directions, yet the 
"pass in on $ext_if" statement refers to the same queue throttled to 
the upload bandwidth.

What am I missing here?

Thanks.

Chris