I had hit the rate limit a few trimes when it was new, but never since then. I think the limit has been either removed or vastly reduced from that experience. I don't see any of the people I follow complaining about it either.
I'm pretty sure the limit was one of his experiments that he's since rolled back on. It may even have been an emergency measure to mitigate the worst effects of another bug, but I'm not sure if he's ever been openly honest about any of this. There was certainly a weekend where the limit was imposed, then raised, then—I think—raised again... and I don't think we've really heard anything about it since.