Usually no. The problem is, that lemmy.ml is hosted on a too underpowered server or has a too slow data connection to handle the amount of users. In the last 2-3 weeks user count skyrocketed due to Reddit fuckups.

Instances with servers capable of handling the amount of users/requests will run better.

Instead of pointing users directly to lemmy.ml it would help mentioning https://join-lemmy.org/ instead so the load spreads over multiple instances. Also disabling registration on here might help in long-term.

So, everyone: Advertise Lemmy! But don't advertise lemmy.ml! 😀