It's hit and miss. Some instances are sending the same activity 2 or 3 times, and there's a theoretical maximum on the number of activities that an instance can process, so whether federation of a particular thing happens depends on how whelmed a server is at the exact moment you send it.
I've also seen a comment from lemmy.ml not being acted on by LW, so there are some drops happening.
PieFed
It's hit and miss. Some instances are sending the same activity 2 or 3 times, and there's a theoretical maximum on the number of activities that an instance can process, so whether federation of a particular thing happens depends on how whelmed a server is at the exact moment you send it.
I've also seen a comment from lemmy.ml not being acted on by LW, so there are some drops happening.