Well, that's both true and not true. With digital (and I could be wrong; I lurk at some digital oriented sites though), it's like you've committed to a particular film when you bought that model with that sensor. Yes, anything you do with that camera will be consistent to itself. But a 5dii at iso100 might not be exactly the same as the equivalent model from a different company. That's all it is with film - you're changing the sensor each time you choose a different film. While there might be smaller differences between the various Canon, Nikon, and Pentax models as compared to differences between Acros, FP4, and TMax100, there are still differences. And those differences at least partly come down to how you use them, develop them, and print them. The variables that exist can have a more visible effect with film.
And don't forget that many differences seen by the photographers (both film and digital) are NOT seen by the average person looking at the same images.
All fair points and well taken.
"Once the amateur's naive approach and humble willingness to learn fades away, the creative spirit of good photography dies with it. Every professional should remain always in his heart an amateur." - Alfred Eisenstadt