Yes, I've seen that clip.
As you say, it is concerning.
I'm a complete numpty regarding netcode, so my thoughts on the subject don't hold much weight.
But I've certainly experienced this in GT6 Quickmatch events, and simply in online lobbies too.
My only thought when I saw that clip was did players around the world using US PSN Id's contribute to that when the servers weren't ready?
Clearly I've no idea.
But I hope this issue can somehow at least be minimised by PD.
Which in some respects falls back to my post earlier.
To me it is in PD's interest to keep US players engaged while introducing other players from around the world.