My friends have brought it up on their own and it indeed seems like the loading times for changing shards and connecting to a server has increased.
This occurred during the beta, most likely after what ever update coincides with this previous report.
To phrase what another had said:
It’s doing this weird thing where it shows you as logged in while you’re still in the loading screen; other people will get the announcement that you’ve joined way before you load in.
Here's an example where it says the player joined but it takes much longer to actually be in the game.
Load shards or connect to a dedicated server.
Takes much longer to actually load in and the messages say you are in even when you are not.