Only about 30 of my 100+ activities have been migrated over. The most recent announcement on the migration from MB says that larger activities will take longer. So what qualifies as larger? Most of my rides are between 1:30 and 2 hours which for biking certainly does not qualify as long.
It would also be nice to have a reasonable estimate as to when these activities will be migrated.
As of today, 80% of all activities at MotionBased have been migrated to Garmin Connect. As a result, you can login at Garmin Connect with your MotionBased username and find most of your activities. The remaining 20% will be migrated over the next few months. Most of these are larger activities which take longer to transfer.