You are indeed right - my mother (who's 68) is not in the slightest interested in new fangled technology - as long as it turns on and cleans the carpet, then that's all she wants it to do. To most women, vacuuming is a chore, and one that they don't particularly relish doing, so a vacuum cleaner is often only brought out when its really needed, and to perform a menial chore. How many sensible and prudent women would want to spend nearly £500 on an object that essentially carries out a boring chore?
Women as I say, will be happy with a 60quid Vax upright as long as it does the vacuuming. End of story.
I'm sure most young women would have things higher up the desirability scale than a vacuum to spend their hard earned dough on - such as food and shelter.
Women are more likely to buy a Dyson DC54 for their boyfriends or hubbys to use. Without any doubt at all, the DC54 is a man's appliance, and those salesmen in Currys will be more likely to demo them to men (With fat wallets) than to women.