I am Premier 1K, and my boarding pass shows I am in BG5 on today (3/4) flight 1562 EWR-SFO. I asked the agent if this boarding group could be changed when I dropped my bag at EWR PremierAccess check-in. She tried to explain to me the boarding process has been changed and why 1K now SHOULD be in BG5. I should have printed out the page in the above link.

We are boarding in one hour, I will see if they will let me board in the first group, will report back.