Resistance can depend a lot on the density of your beard. A light beard will not provide much resistance, and the razor will plow through it effortlessly. A heavy beard will definitely put up some resistance no matter how sharp a blade is. That being said, if you find the razor is literally being stalled mid-stroke it is usually due to a dull blade or faulty technique.

If the user is:
a) experienced, the cause is likely the former
b) inexperienced, the cause could be both. Proper stropping also comes into play, so that's something else to consider.

So many variables at play when it come to getting a smooth shave....