G/P are now the 3rd ranked team in the world when it comes to the FD (only P/C and S/K have ever scored higher). AND they left points on the table. In looking at their FD protocols, on their one foot step sequence, Piper got a level 2, Paul a level 3. Both Madison and Zach got level 3 - if Piper had done a level 3, that would have given them around an extra 0.5 and the silver medal.
In the RD, they only got level 2 for their Finnstep, and again Piper only got level 2 on the step sequence (Paul got 4). Comparing to C/B who were one level higher on both elements, that's over a point that G/P lost in base value.
While the US is definitely favoured for the medal, I don't think we can rule G/P out, especially if they work on Piper's levels. In the SD, teams 2-5 were basically tied on PCS, and in the FD there was about a point between 1-3. And that's without G/P having the 'former world medallist/big name coach' reputation points.
In any case, Piper and Paul have been knocking it out of the park with their FD choices the last couple years. And they also normally have really fun RD (Sgt. Pepper, disco pornstache, sleeve reveals). It'll be interesting to see what they've come up with for next year.