There is often a small battle going on on being first to answer questions (a luxury problem that shows we are a success). Unfortunately this can have the effect that answers are kept short (short description and link to external source).
I must admit to having done this myself a couple of times. :-/
However this affects the general quality of the answer, and a link in itself isn't an answer. Also links tend to come and go, while we are in for the long haul :-)
I have begun moderating on this, asking people to expand a little on the answer (and then make a link to a full article). This IMO improves the question vastly.
Do you agree on this approach?