Quite an interesting discussion.
The analagy of airlines is worth exploring. Airlines adjust prices by knowing the occupancy rate on a minute by minute basis ~ because of the internet. Consequently, the prices change, several times a day, particularly as you get closer to the day.
Many of my ski ventures take place midweek to midweek, simply because the flight element of my ski cost reduces from £160ish, at weekend, to £60ish. However,rail/taxi/b&b/lunch/dinner/drinks/ski hire & lift pass costs all remain the same. They are all predicted at the start of the season.
In reality, some of these prices do change. Accomodation cost will increase in February ~ because owners will predict the numbers of people, based on last years numbers, and the current economic climate. They do not have the instant internet market feedback that airlines do.
