Judging from the slowdowns and hiccups around here, yeah, I'd say that was "some". And we're not done yet either. Plenty of people in the world party on friday and saturday. Plenty of people in the US are camping or something on an extended weekend.
Everyone checks it eventually as the week rolls on though. Kinda fortunate for us, really. Spreads the influx out.
There are a few different sites that keep track of it. I like the way https://fedidb.org/software/Lemmy presents the stats. The dip in users that they show though is from them removing a bunch of bot instances from their metrics.
I'm one that left after RiF got shut down. Lemmy.world just announced an increase of 20k new users over the weekend (about a 40% increase), so I'd say there's quite a few of us