That is not the case. There have been some models with a shorter heel, but they all have a proportional width IRL. The idea is to have a slimmer profile....
BUT most of the shoes/boots have a regular heel height. And the width is the same.
Alessio has been making shorter heel boots for a while. These are from AW09:
The boots are comfortable from the first time you wear them. The derbies hurt under the ankles slightly, but a few wears fixes that as the leather loosens out.