This will depend on the type of meeting. If the meeting is action-oriented (e.g. a kick-off or progress meeting), this will probably take a reasonable portion of the meeting – especially if who does what is not clear. The discussion of who should take the various actions can be very important and should not be skimped.
It is also worth remembering that actions are more likely to be completed efficiently if they are given to the willing; and that asking everyone to do something usually means no-one takes responsibility for it!