Hi
kebabcurry,
INSEAD's GMAT average in 2015 was 700 (combining both MBA'15J and 15D classes). So yeah, there has been an ascending trend in the last years.
This being said, classes around mine (~MBA'10-12) also averaged around 710, so I wouldn't necessarily say that INSEAD is starting to focus more on GMAT like US schools do.
From what I have seen, INSEAD still takes a more holistic approach when it comes to admissions, and GMAT is just one more parameter to consider in someone's application.
Thank you very much.
Warm regards
Alex