Yes, this can be changed to send out part or all of the body as well. By default it is set to not send any of the body out. If they want to change this, there is a setting in the Content Islands that needs to be changed:
Number of body characters to include in RSS Feeds:
Set to zero to not include anything from the post body
That's probably set to 0, they can change that to a higher number to include part/all of the body.