Especially this time of year, most of us would give someone at home an expected return date but also let them know that it's more or less a guideline. A storm might come in or something else might happen which would force them to stay on the mountain one or two extra days. I wouldn't go so far as to judge who is prepared to go where and do what, but the assumption is (most of the time) if they're doing it in winter, they know what they're getting themselves into.
On the same note, the "REI" attitude so prevalant in the Northwest engenders an attitude where people feel all they need to do is drop a few bucks on gear, and whammo: instant climber/skier/snowshoer/mountaineer. This is more common in the summer because most of these people are scared of a little weather.
Those are my two sweeping generalizations of the day.