This has nothing to do with doing well on VR. Many of the people I know who scored poorly on VR, compensated with very high science scores. When it comes to academic papers, that is a very different thing - they already proved they can do that with the tough science passages and literature heavy experimental questions on some MCATs. They understand the science, which is what matters most, not that they can differentiate between some prose, flowerly or complex english idiosyncrasies on VR.
Now, what really matters is for sure verbal english communication and ability to convey your thoughts. This is what truly matters, and i would hope they can flesh that out during an interview.
FYI, I know people who only know english who have also done just as poorly on VR - yet they can hold intellectual conversations no problem.