click and contextmenu events

Although it's mostly out of scope, the spec talks a little about click
events.  I played with the IE10 implementation a little wrt. click (using
www.rbyers.net/eventTest.html) and was surprised that on a region with
touch-action:none, ANY pointerup seems to be followed by a click event.
 This means, for example, that if a map is handling pan gestures, but also
supports being tapped (eg. to place or select a push-pin), then the
application needs to have it's own tap gesture recognizer (to avoid taking
the tap action at the end of every pan).  'click' is an indication that a
user intends to activate something, I wouldn't have expected the UA to want
to send that for anything other than a singer-finger tap.

The spec has a note that includes "Because it is not a compatibility mouse
event, user agents typically fire click for all pointing devices, including
pointers that are not primary pointers".  This covers part of what I'm
seeing, but not all of it.  Perhaps we should expand this note to describe
the typical behavior of click in more detail?  This seems like an easy
place for implementations to differ, resulting in compatibility problems.

If we're going to mention click, should we mention contextmenu too?  It
seems the behavior in IE is similar (eg. contextmenu still fires even when
preventDefault is called).

Thanks,
   Rick