That is usually correct, except they are in the process of rolling out a new seating interface where all lie-flat Business seats use the same (new) blue icon.

If you have a seatmap where the aisles go horizontally, and the Business seats are blue, then they are the new Polaris seats. Another way to tell is that the new Polaris seat is all-aisle-access (1-2-1 on 777 and 787, 1-1-1 on 767), so if any seat doesn't have aisle access, it's not that. Orange seats are guaranteed to be old ones.

With the caveat that the only meaningful time period for this indication is inside the 24h check-in window. By the time January rolls around, there might only be 2 or 3 772s left with the IPTE seats on longhaul routes. Unfortunately, these appear to be focused on ORD, operating a general rotation of NRT/PVG-ORD-MUC/FRA/GRU.

Just have to wait and see. Also one more thing has changed. Our flight back is on AC who I called to reserve seats as I was not allowed to on the UAL website. Even after I got them the only one to show for both legs, DEL-YVR and YVR-ORD was the ones for my wife whose miles we used to book. Now mine sho as well. . Hmm. The other leg, PEK-DEL does not show seats but I called Air China to get those. I wonder why.
Thank you