Ash tree is not from the movies, but from the good old medieval practice. Hawthorn works much worse- one could not get a stake sufficiently thick and sturdy, as hawthorn is a thin plant. Just look at that photo. His, excuse me, "stake" is something like an inch in diameter. It is more like a rod for chastising. And a proper ash stake would be at least 2, or still better, 3 inches thick.
Your 'probly right--I seem to remember Chris Lee gettin' trapped in a jagger bush (I think it was supposed to be hawthorn) and being immobilized enough so Pete Cushing could stake him proper with a fence post. A hawthorn stake would 'probly only have given him slight discomfort.