I have been trying to test Connections and Groups specifically and the ability to use GCM as a messaging medium in general.
The first thing I have noticed is that I am apparently using a different version of Garmin Connect Modern than many of my connections most of whom are in Europe or Australia.
Specifically, when I click on the three bars in the upper left hand corner, I get a 17 item drop down list containing:
Activities
Badges
Calendar
Challenges
Connections
Courses
Devices
Goals
Groups
Personal Records
Reports
Segments
Sleep
Steps
Training Plans
Weight
Workouts
My connections only get 9:
Activities
Badges
Challenges
Connections
Devices
Reports
Sleep
Steps
Weight
What is the deal with that? Makes you wonder what else is different.