Have you heard the advert for the Tomtom IQ routes? I just heard it on the radio and it seems to be misleading to me. They say that because the tomtom gives a different route for driving on a different day you can get to Cornwall from London in 5 hours rather than 7, therefore saving 2 hours! I can understand if they said that the system reconises if you're driving at a busy time and therefore tells you it's going to take longer but surely changing the route doesn't make it any quicker? Unless it's giving you a longer route on a Monday for some strange reason.
Surely the route would have to be virtually the same anyway wouldn't it? I'm not sure of the exact route but I expect that all the major roads would be the same. You can't save 2 hours by coming off the main roads and going down country lanes.
So surely the advert should say that it gives you a more accurate estimation of the time it'll take for the journey based on when you're driving, not that it changes the route and magically saves you 2 hours. Unless I'm missing something?