Ford no longer show the various urban/rural estimates and only offer a combined mileage.
There is nothing optimistic about them at all, they are proven under test conditions, the same conditions other manufacturers use. Just because some people cannot attain those figures does not mean Ford are being optimistic.
By your own words, they are achieved under conditions that the normal motorist cannot achieve and are therefor by definition, optimistic.
Nowhere do Fords state that these mileages were achieved on a rolling road.
I find it both amusing and aggravating that you have nothing to offer to these threads but just criticize other FMs opinions.
I like to hear what other Fiesta owners achieve for their various models and what they have to add to the thread even if you find this subject "boring".