I just want to say thanks for staying on top of this. I was about to mention it again myself.RSS feeds are still slow to update. This article has been up over an hour and still has not hit my RSS feed.
I would not say it is instantaneous, but Feedly RSS was showing MR articles within a matter of minutes for me all along.I'm not sure about others, but I'd always perceived MacRumors' RSS feed as updating at periodic intervals that don't correspond with article publication.
I am consistently seeing MR articles in my RSS feed within a few minutes now. So this seems to be fixed.