If you are referring to the research testing done by Transport Canada, I would doubt that this is directly addressed since it was not any type of data that could be used to compare carseats or evaluate their performance in a scientific way.
Indirectly, it is quite likely that all manufacturers do internal testing to the most severe NCAP pulse (usually referred to as the Toyota Echo pulse). This is theoretically similar to forces observed in research testing done by Transport Canada and NHTSA when they crash test vehicles with child seats in them. So, in that regard, I would expect most new models to perform better than previous ones designed before such testing was common. I do know Britax touts their Safecell technology for energy and head excursion management and they also have a totally different system that re-inforces the shell in the new design. Whether or not that improves real world crash performance and injury/fatality numbers, we may never know. Unfortunately, there is no reliable testing in North America that allows us to compare the safety of one child safety seat to another.