I would say it's safe to say that the N. macfarlanei is not pure.
As for the N. 'macrophylla'. I took some pictures as requested by Robin. Lousy weather so they will have to do. Also keep in mind that the plant Jeremiah shows would have originated from N. macrophylla seed while mine came from N. lowii seed. There could be some differences from that alone.
First I will highlight why I think it's a hybrid.
The points around the outside edge of the peristome in several places.
The fairly broad peristome.
The close spaced and less pronounced ribs
The greater amount of constriction above the hip followed by more significant flairing just below the peristome.
I think the pictures show these various traits if you look carefully, although you may not find ever single one in every picture.
As I mentioned earlier. Time will tell! Particularly when the plant makes upper pitchers. I am not trying to take anything away from the plant, even if it is N. trusmadiensis instead of N. macrophylla, it is still a beautiful plant.
Recap of Jeremiah's plant
Couple small N. macrophylla 2-3cm pitchers
N. macrophylla 7cm pitcher (comparable size to Jeremiahs I think)
3cm N. trusmadiensis pitcher for comparison to N. macrophylla above
Larger approx 7cm N. trusmadiensis pitchers