No that's not true. Some places may be brainwashed to only carry that brand, but the brand doesn't make it easier to find a fit for everyone, no ONE boot manufacturer fits almost everyone. That is fact.
Again, much is hype. They can market the crap out of their boots and people are going to want them (and more expensive high end models they don't need) because they want to wear the same boot as their fave skater. *barf*
Personally it was comfort that made me pick Edea’s. I have narrow feet for it was them or Ridells, if I recall correctly, and the Edea’s were very comfortable, if ugly.