I would like to think this is true, but there are just too many frustration stories of confusion of 'which instance' to choose, losing posts due to admins (and followers) shutting down instances and having to tell your followers where to go next.
Best part is the instance they are most likely switching to is the main instance (mastodon.social) since that is the biggest one and less likely to go down, and encourages centralization.
To solve this, they should close sign ups. Why haven't they done that yet?