I go there for a couple of smaller subreddits I still visit (barely starting out on Lemmy, tough).
But a lot of content seems to be slowing down, like 2 day-old threads on the home tab (I only go on desktop with adblockers).
This is obviously anecdotal, and have no numbers to back it up. We'll have to see how it goes into the future. Reddit just keeps pissing off their core users time and time again.
My anecdotal experience is pretty much the same. My home country's sub (the only one I really look at "new" on) slowed down a lot since the Reddit blackout. Before, you could expect a new post every 15 minutes or so. Now? A whole day can go by with one or two new posts. It's weird. I still see the usual names in the comments, but posting in general is extremely slow.
My "Best" tab in the homepage (this is old reddit mind you, I don't know if that's a thing on nuddit) also holds the same few posts at the top for the entire day, whereas it used to cycle a lot faster before the blackout.