The word "expert" has come to be used in something of a pejorative way. For what it is worth I have seen enough postings by several people on FR that I would rate them as experts whatever that means.
The interesting thing to me is that two true experts will often disagree. I remember when I lived in Western Kansas, there was a great mehchanic who loved Chevy's and hated Fords. Yet in my hometown the best Mechanic around was a Ford man totally.
thats sort of like arguing over who's .300 magnum is better - they all get the job done, but everyone has their preference