Interesting. I read a similar article on the BBC here:
http://www.bbc.co.uk/news/technology-37703556
I still believe the root issue has more to do with the mapsets, than anything else. Different "values" are placed on various roads to achieve the USP of these devices.
I can't quite reconcile why we are trying to determine the differences of modern devices, but still using obsolete Mapsource software. I do accept some users prefer MS over BC but the analogy is the same as trying to use a GS911 to find faults with an 1150 machine. Each to their own, of course, and my post here isn't one trying to show the rights of one over the other. My point is that Garmin are -or should be - aligning their latest devices to BC, over MS?
Basecamp certainly has more preference settings, but doesn't have a setting for lorries (or at least, I haven't found it) as already mentioned.
The satnav I have in my car will produce three different route choices, and for me to 'take a pick'. If I decide to drive a different route it remembers it and offers it to me the next time I select the same destination. That calculation can only be made using predetermined values for specific roads. Then, if there is traffic congestion along the route, a recalculation takes place (again) and offers an alternative, which may be accepted or declined by the driver. Again, it's down to the road values of a given mapset.
With the program getting underway in the UK by Ordnance Survey (and not before time) we may end up eventually with a common denominator of roads which match UK drivers and riders, rather than those set by an American based company, or a continental Mapper, and their logic.