The same applies to us. It affects all shards we are on. More or less, you could say.
But since the new layout went live, it has really slowed down.
Some colleagues have reverted to the old layout—it's much faster.
A week ago, I had a customer presentation and the dashboard's performance was so poor that there was discussion about whether it would always be like that!
So please, MERAKI, don't just keep releasing new features and layouts, but also think about the workflow and how much a slow response affects it.