I suspect that it's very well known. It's all over every single Disney resource - forum/facebook group/dining site- that I know of...and even friends going who aren't normally in the loop about WDW changes have been messaging me about this.
I hate to sound like a Debbie Downer, but I think back to August 2012 and the phone chaos to get dinner ADRs when BOG first opened. They didn't even bother with the website for the first 2 days, likely for fear it would crash the servers. I am seriously wondering if the website is going to crash and then the phones will get overwhelmed tomorrow morning. I hope that doesn't happen, but you've got a situation where you've got the normal #s logging in for standard 180+10 booking in addition to everyone and their mother at that mark and before who wants lunch ressies. Yea...thinking this is going to be madness.