Yes, something like a subset. This article is a good read:
Features vs Stories
Excerpt:
I realized today that I hadn't made
explicit the difference in my mind
between features and stories and it's
an important difference. Essentially,
a feature is a group of stories that
are related and deliver a package of
functionality that end users would
generally expect to get all at once.
For instance, inline table resizing is
a feature (note: this is the ability
to drag to resize tables, rows and
columns – try it in Word). In the
first pass, you'd probably have a
single story for inline resizing of
tables, but it would be too big to
estimate. So you break it down into
three stories, resize columns, resize
rows and resize the table itself.